In Another World V01 — Adventuring With Belfast
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.
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
, 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: adventuring with belfast in another world v01
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" is a key story arc within the light novel and manga series In Another World With My Smartphone Isekai wa Smartphone to Tomo ni ), specifically featured in Volume 01 Summary The story follows Touya Mochizuki
, a young man accidentally killed by God who is reincarnated into a fantasy world with his smartphone as a special gift. Rotten Tomatoes The Kingdom of Belfast
: Touya arrives in this kingdom, which is divided into the soldier army and the knight order. The novel’s greatest strength is the relationship between
: Touya rescues the King of Belfast from a poisoning attempt. The Royal Family : After saving the King, Touya meets Princess Yumina Ernea Belfast , who impulsively asks to marry him. New Friends & Skills
: He begins adventuring with sisters Elze and Linze Silhoueska, eventually registering Yumina at the local Adventurer Guild to take on higher-ranked requests, such as defeating a group of Great Apes. Core Characters in Volume 1 Touya Mochizuki
: The protagonist who uses modern technology (smartphone) and high-level magic to solve problems. Yumina Ernea Belfast
: The 12-year-old Princess of Belfast with "Null Magic" eyes that can see into people's souls. Sushie Ernea Ortlinde
: The Duke's daughter and Yumina's cousin, whom Touya saves early in the volume. In Another World With My Smartphone Wiki Series Details Yumina Ernea Belfast - Heroes Wiki
The most immediate thing prospective readers need to know is that this is a "Slow Life" (Iyashikei) story. If you are looking for high-stakes battles, demon lords to defeat, or complex political maneuvering, you will not find it here.
Volume 1 is entirely dedicated to world-building and the developing bond between Takumi and Belfast. The plot structure is episodic: the duo travels from point A to point B, encounters a minor obstacle (usually a monster or a puzzle), solves it easily, and moves on.
The central hook is Takumi’s dual advantage: he has modern knowledge and "game meta" knowledge. He knows the locations of hidden items, the weaknesses of monsters, and the geography of the land. Because he is overpowered (OP) in a subtle way—and because Belfast is an incredibly powerful High Elf—there is rarely any true danger. The tension comes instead from the mystery of why he was reincarnated as a creature and what changed in the timeline.
The story begins with Haruto Amakawa, a mid-level corporate analyst in Tokyo—intelligent, loyal, but deeply unfulfilled. After dying in a train accident while protecting a child, he expects oblivion. Instead, he awakens in a summoning circle, not as a legendary hero, but as an "irregular" in the kingdom of Eldelheit. Belfast’s maid skills are not window dressing
However, something is wrong. The summoning spell fractured. Haruto didn’t arrive alone.
Manifesting beside him, in a swirl of azure rigging and polished silver, is Belfast—the famous Aurora-class light cruiser, now in her humanoid "ship girl" form. Confused but poised, Belfast immediately assesses the situation with her signature line: "I’m Belfast. Let me take care of everything."
Unlike most isekai protagonists, Haruto has no combat skills, no magic stat screen, and no legendary weapon. His only asset? Belfast. Her tactical rigging, cannons, and radar are anachronisms in a medieval fantasy world—but that doesn’t make them any less devastating.
"Adventuring with Belfast in Another World v01" is surprisingly melancholic. The core theme is memory as weaponry.
Belfast’s greatest strength is not her guns—it is her memory of World War II. She remembers the screams of sinking sailors. She remembers the cold. When she faces the Abyssal Echoes, which are manifested grudges of drowned worlds, she must relive her own traumas. Kaito, as a historian, recognizes this. He becomes her therapist as much as her admiral.
The volume also explores the ethics of shipgirls. Are they weapons or women? Asteria’s nobles want to replicate Belfast to create an army of living ships. Belfast refuses, arguing that to manufacture a soul is the greatest sin. This philosophical debate runs beneath every action scene, making the light novel feel weighty and important.
The fantasy world, Alfheimr, is standard on the surface (guilds, dungeons, demon lords), but the author cleverly contrasts magical systems with Belfast’s 20th-century technology. Magic requires incantations and mana; Belfast’s cannons use physical shells. Magic detection spells fail against her radar jamming. Healing potions can’t repair her steel hull—so Haruto must learn alchemical metallurgy.
This creates unique stakes. Belfast is powerful but not invincible. She has limited ammunition (resupplied via a mysterious "dock space" she carries), and her fuel gauge becomes a recurring narrative tension.
The heart of the volume is the relationship between the two leads.
The "romance" is extremely light in this volume, playing out more as a deep mutual trust. It is a wholesome partnership that prioritizes companionship over fan service.