Adventuring with Belfast in Another World v01 " appears to be an unofficial or fan-created adult game project inspired by the In Another World With My Smartphone (Isekai wa Smartphone to Tomo ni) light novel and anime series.
The project focuses specifically on the Kingdom of Belfast, one of the primary settings in the original series where the protagonist, Touya Mochizuki, establishes significant royal connections. Project Overview
The "v01" version likely represents the initial full release or a major milestone following early development builds like v0.5.
Source Material: The game is based on the Kingdom of Belfast from the light novel series In Another World With My Smartphone.
Characters: Key figures likely include Yumina Ernea Belfast (the crown princess), King Tristwin, and Queen Yuel.
Themes: Based on developer logs, the game includes "Vanilla" and "NTR" (Netorare) roleplay scenes and CG art. Setting: The Kingdom of Belfast
In the original lore, Belfast is a pseudo-medieval fantasy world that recently modernized through the protagonist's influence.
Military: Divided into the regular Army (for defense and invasion) and the Knight Order (for domestic law and order).
Diplomacy: Historically hostile toward the Regulus Empire but friendly with the Refreese Imperium. Key Locations:
The Royal Castle: Located in the capital, where the royal family resides.
Belfast Mansion: A three-story European-style house gifted to the protagonist. Core Characters to Expect Belfast Mansion | In Another World With My Smartphone Wiki
Yuto’s heart hammered against his ribs as the creature emerged from the treeline. It was a grotesque fusion of wolf and armor, standing three meters tall, its eyes glowing a ferocious crimson.
"A Magic Beast," he whispered, stepping back. "I don't have any weapons! What do we do?"
Beside him, Belfast didn't flinch. She adjusted her headdress with a calm, practiced motion, looking less like a warrior and more like she was about to serve afternoon tea.
"Master," she said, her voice cutting through the tension like a sharp blade. "Please step back. Dust and debris are difficult to clean out of one's uniform."
"Belfast?!"
The beast roared, lunging forward with claws capable of shredding steel. Yuto braced for impact, but a blinding blue light erupted. The air grew heavy, smelling of ozone and gunpowder.
"This is a bit of spring cleaning."
With a flash, a massive rigging materialized behind her—turrets spinning into alignment as if they were extensions of her own body. The elegant maid leaped into the air, her heels clicking together as she leveled a cannon the size of a car directly at the charging monster.
"Fire."
The explosion shook the forest. When the
is a peaceful, knight-led nation known for its strong diplomatic ties with the Refreese Imperium. It serves as the home for Touya’s first major allies and eventual wives. Political Structure
: Divided into two military groups: the Soldier Army (external defense) and the Knight Order (internal law and order). Technological Shift
: Thanks to Touya, Belfast becomes the birthplace of "otherworld" inventions like bicycles, shogi boards, and ice cream. Key Locations in Volume 1 The Royal Capital, Belfast
: The heart of the kingdom where the Royal Palace is located. It is the site of the assassination attempt on King Tristwin, which Touya thwarts. The Royal Palace
: Residence of the King and the setting for the first major political shifts in the series. Silver Moon Inn adventuring with belfast in another world v01
: A recurring location where adventurers often gather and stay while in the capital. Prominent Figures (Volume 1) Yumina Ernea Belfast
: The Crown Princess of Belfast. She is a powerful mage possessing the "Mystic Eyes of Intuition," which allow her to see the true nature of people. She is the first to propose engagement to Touya. Tristwin Ernes Belfast
: The 15th King of Belfast. He is saved from poisoning by Touya’s magic, which cements the relationship between Touya and the royal family. The Belfast Knight Order
: Led by reliable commanders who help Touya navigate the local laws and military threats. Volume 1 Plot Highlights Arrival in Belfast
: Touya and his companions (Elze and Linze Silhoueska) arrive in the capital to register as adventurers. Saving the King
: Touya discovers King Tristwin has been poisoned by a treasonous plot. He uses his advanced magic to cure the King instantly. The Engagement
: Impressed by Touya’s character and power, Princess Yumina chooses him as her fiancé, sparking the "harem" progression of the series. magical spells Touya learns in this volume, or a list of the other countries he visits shortly after?
Here’s a sample text for Adventuring with Belfast in Another World, Vol. 01:
Chapter 1: A Foggy Departure
The last thing I remembered was the taste of cheap instant coffee and the glow of my computer screen. Then came the light—soft, warm, and pearlescent, like morning fog over a calm sea.
When I opened my eyes, I wasn’t in my apartment anymore.
I lay in a meadow under twin moons. The air smelled of herbs and distant woodsmoke. Beside me, kneeling gracefully with her hands folded over her skirt, was a woman I’d only ever seen in a game.
Belfast.
Her silver hair swayed in the breeze. Her red eyes, usually calm and professional, now held a flicker of confusion—and relief.
“Commander,” she said softly, her voice cutting through the silence like a bell. “It seems we’ve been summoned.”
Chapter 2: A Maid in a Magic World
We learned quickly that this wasn’t a simulation. Magic was real. Monsters roamed. And Belfast… Belfast was still Belfast.
She cleaned our camp before I could wake. She organized our inventory of wild herbs and goblin daggers with military precision. And when a pack of horned wolves surrounded us on the third day, she didn’t flinch.
“Please stand back, Commander,” she said, stepping forward.
Her rigging manifested not as steel and steam, but as shimmering ethereal cannons wrapped in silver chains. She fired once. The wolves scattered.
“A maid must protect her master,” she said, brushing dust from her apron. “Even in another world.”
Chapter 3: The Guild and the First Quest
We found a town called Lunaris, built into the roots of a petrified giant. The Adventurer’s Guild was a noisy hall filled with mercenaries and mages. When the receptionist asked for our class, I hesitated.
“Retired naval officer,” I said.
“Maid,” Belfast added smoothly. “Specialized in logistics, close-quarters service, and artillery support.” Adventuring with Belfast in Another World v01 "
We were given a D-rank quest: clear out a cave of giant spiders.
Belfast insisted on ironing my tunic before we left.
Epilogue: Tea Before the Storm
That night, under the twin moons, Belfast brewed tea using a tin pot and some leaves she’d identified as “similar to Earl Grey, but with a hint of mana.”
She handed me a cup.
“Commander,” she said, gazing at the unfamiliar stars. “Wherever we are, my duties remain. I will serve you. I will protect you. And I will ensure you wake to a clean campsite every morning.”
I laughed. “Even in another world, you’re still perfect.”
She smiled—just a little. “That is because I am Belfast.”
End of Volume 01
Next Volume Preview:
The city guard requests Belfast’s help with a cursed tea set. A dragon asks for cleaning lessons. And a shadow from the Royal Navy’s past appears on a wanted poster.
Would you like a version adapted for a light novel back cover, or a full first chapter?
The keyword "Adventuring with Belfast in Another World V01" refers to the first volume of the light novel and manga series officially titled In Another World With My Smartphone (Isekai wa Sumātofon to Tomo ni). It features the introduction of Princess Yumina Ernea Belfast, a central heroine from the Kingdom of Belfast who joins the protagonist, Touya Mochizuki, on his journey. Overview: A New Life with a Digital Edge
The story begins when 15-year-old Touya Mochizuki is accidentally killed by a stray bolt of lightning thrown by God. To make amends, God offers to reincarnate him into a fantasy world with enhanced physical abilities, mastery over all seven types of magic, and one request: Touya chooses to bring his smartphone. This device remains functional, equipped with maps and translation tools provided by God, allowing Touya to navigate this new "pseudo-medieval" world with modern convenience. Volume 1 Plot Highlights
The Arrival: Touya awakens in a new world and immediately saves twin sisters Elze and Linze Silhoueska, who become his first adventuring companions.
The Kingdom of Belfast: A major turning point occurs when Touya saves Sushie Ernea Ortlinde, the niece of the King of Belfast, from an attack. This leads him to the capital city, Alephis, and into the inner circles of the royal family.
Saving the King: Touya uses his magic and smartphone to identify a poisoner and cure King Tristwin Ernes Belfast, earning the eternal gratitude of the crown.
The Princess’s Proclamation: Impressed by Touya’s character and power, Yumina Ernea Belfast—the 12-year-old Crown Princess—boldly declares her intent to marry him. She joins his party to observe him over a two-year "engagement" period, officially starting her life as an adventurer. Key Characters in Volume 1 Key Traits Touya Mochizuki Protagonist
Reincarnated with a smartphone; possesses "Null" magic and mastery of all elements. Yumina Ernea Belfast
Princess of Belfast; possessor of "Mystic Eyes of Intuition" that can see a person's true nature. Elze Silhoueska
A physical fighter who uses gauntlets and "Boost" magic to increase her strength. Linze Silhoueska
A shy mage and Elze's twin; specializes in fire, water, and light magic. Yae Kokonoe
A samurai from the land of Eashen who joins Touya after he helps her in the capital. World Building: The Kingdom of Belfast
The Kingdom of Belfast serves as the primary setting for Volume 1. It is a nation known for its thriving sewing industry and silk fabric. Its capital, Alephis, is built around Lake Palette and features a grand royal castle at its center. Touya’s presence begins to modernize the kingdom almost immediately, as he introduces new concepts like ice cream, shogi, and bicycles to the royal family and citizens. Where to Read and Watch For those looking to dive into the official series:
While there is no standalone series titled " Adventuring with Belfast in Another World ," this likely refers to the Kingdom of Belfast arc in the popular series In Another World With My Smartphone (Volume 1).
Below is a review of Volume 1, which introduces the Kingdom of Belfast and the protagonist's first major adventures. Volume 1 Review: A Refreshing, Stress-Free Isekai The story follows 15-year-old Mochizuki Touya Excerpt: Chapter 2 - The Demon of the
, who is accidentally killed by God. As an apology, God reincarnates him into a fantasy world with enhanced physical and magical abilities, plus one special request: Touya gets to keep his smartphone
. In this new world, he quickly meets the twin sisters Elze and Linze Silhoueska and eventually rescues Yumina Ernea Belfast , the princess of the Kingdom of Belfast. The Good: Pure Comfort Reading Unique Hook:
Unlike most protagonists who struggle to adapt, Touya uses his smartphone for everything from GPS mapping to looking up recipes and advanced magic. It adds a fun, "anachronistic" layer to the typical medieval setting. Low-Stakes Fun:
This is a "power fantasy" at its most relaxed. If you enjoy stories where the hero is immensely powerful and the focus is on world-building and character interactions rather than grueling life-or-death battles, this is a perfect fit. The Belfast Arc: The introduction of the Kingdom of Belfast
in the latter half of Volume 1 brings in political intrigue and the "Royal Family" chapters, which help ground the world beyond just simple monster hunting. The Not-So-Good: Lack of Tension Overpowered Protagonist:
Touya is gifted with all seven magical attributes, making him almost impossible to defeat. For readers who prefer high-stakes conflict or a protagonist who has to work for their power, this might feel a bit too easy. Standard Tropes:
The series leans heavily into established isekai tropes, including a growing harem and a "lucky" protagonist who stumbles into important positions. Final Verdict In Another World With My Smartphone Vol. 1
is a "cozy" isekai that prioritizes fun and exploration over drama. It’s an excellent choice if you want a lighthearted adventure featuring a high-tech twist in a magical world. specific characters
in the Belfast royal family or perhaps a recommendation for a similar isekai series
Kingdom of Belfast | In Another World With My Smartphone Wiki
Debut. Web Novel. Arc 1 Chapter #1. Light Novel. Volume 1. Anime. Episode 1. Manga. In Another World With My Smartphone Wiki Light Novel Volume 1 | Fandom
Adventuring with Belfast in Another World Vol. 01 is a surprisingly grounded, well-paced start to a niche crossover series. It respects the source material (Azur Lane’s Belfast is faithfully characterized) while building a fresh isekai logic around her abilities. Haruto is a refreshingly competent-but-not-overpowered lead, and their mutual dependence feels earned, not forced.
The volume’s only weakness is a slow middle section where the duo runs fetch quests to earn gold for ammunition—a necessary worldbuilding step, but one that drags slightly.
Rating: ⭐⭐⭐⭐ (4/5) – A promising launch. Belfast fans will adore it; isekai skeptics may be pleasantly surprised.
Where to Start: The light novel is available in English from Seven Seas Entertainment. No anime adaptation has been announced as of this writing, but fan demand is high.
So set sail, prepare the tea, and remember: In a world of magic and monsters, sometimes the most dangerous thing you can hear is a maid politely asking, "May I open fire?"
The novel’s greatest strength is the relationship between Haruto and Belfast. Unlike typical master-servant tropes, Haruto refuses to treat Belfast as a tool. He sees her as a person displaced from her beloved Sakura Empire and Royal Navy duties. In return, Belfast—who served as a maid, secretary, and warship—finds purpose in protecting someone who values her judgment, not just her firepower.
Their banter is a highlight:
Belfast’s maid skills are not window dressing. She cleans, organizes, and cooks—but also uses her dusters as tripwires, her tea trays as shields, and her knowledge of naval logistics to manage the party’s finances.
The story begins with our protagonist, Kaito Tanaka, a 28-year-old maritime historian and former Japan Maritime Self-Defense Force radar technician. Unlike typical isekai protagonists who are either overpowered salarymen or shut-in savants, Kaito brings a grounded, almost melancholic expertise to the table. During a catastrophic storm while researching the wreck of a WWII cruiser off the coast of Ireland, he is pulled into a maelstrom and spat out into the world of Eferia—a continent ravaged by a "Mana Rupture."
Eferia is not a land of chivalrous knights and simple quests. It is a fractured realm where magical energy behaves like a volatile ocean current. Monsters are born from "Mana Storms," and the only safe havens are fortified city-states protected by ancient runic generators.
Why is Kaito relevant? Because Eferia has no concept of naval warfare. Their oceans are considered cursed, unnavigable by wooden ships due to sea serpent nests and tidal elementals.
Then, on his second night in a collapsing port town called Dornwick, Kaito stumbles upon a summoning circle etched with eerily familiar hull lines. A flash of silver and sapphire light later, and standing before him is Belfast.
But not the Belfast of the Sakura Empire or the Royal Navy as we know her. This is Belfast (Eferian Ver.) —a "Living Armament" known locally as a Mare Cognitum. She possesses the memories of her WWII service but has been re-forged by Eferia's mana as a physical person. She is elegant, yes. Perfectly composed, certainly. But she is also confused, under-powered, and suffering from "mana corrosion" due to a lack of her native naval spiritual anchor.
Akashi does a serviceable job with the world-building. The exposition can feel a bit "gamey," with characters sometimes discussing stats, skill levels, and item drops a little too casually for a narrative novel. However, for fans of LitRPG or game-centric stories, this will feel right at home.
The magic system is functional but not particularly innovative. It relies on standard elemental affinities and incantations. The more interesting aspect is the setting itself—seeing a "pre-game" world allows the author to subvert expectations regarding locations the protagonist thought he knew well.