by The popular manga “The Weakest Me Rise to the Top with a Wall-Passing Bug: If I Slip Through Walls, I Can Collect the First Clear Rewards Infinitely!” is officially being adapted into a TV anime, with the series scheduled to premiere in 2027.
The announcement revealed the main production staff and two members of the voice cast. Riko Aonori will voice protagonist Henri, while Momoka Terasawa will play his younger sister, Eleleth.
Based on the manga currently serialized in Kodansha’s Magazine Pocket, the series follows a seemingly powerless young adventurer who discovers an unusual exploit in the world’s dungeon system. What begins as a desperate attempt to earn money for his sickly younger sister eventually becomes the secret behind his rise from a bottom-tier adventurer to an extraordinarily powerful one.
With the manga having surpassed 1 million copies in circulation, the upcoming anime is already attracting attention from fans of isekai fantasy, dungeon adventures, and underdog stories.
A Weak Adventurer Discovers an Incredible “Wall-Passing Bug”
At the center of the story is Henri, a young adventurer who struggles to survive in a world where adventurers are judged by their skills and abilities.
Unlike powerful heroes who possess rare offensive or magical abilities, Henri has only one seemingly unimpressive skill: Evasion.
Because of this, other adventurers consider him incompetent.
Henri is eventually pushed into the lowest-ranking jobs available to him and works as a baggage carrier for an adventuring party. Even that position is taken away from him, leaving him with almost no way to earn money.
But Henri has a reason to keep going.
His younger sister, Eleleth, suffers from poor health, and Henri is determined to support her. His desire to provide for his only family member becomes the driving force behind his adventures.
Everything changes when Henri discovers something unexpected about his Evasion skill.
Henri Finds a Secret That Changes His Fate
While exploring dungeons, Henri discovers that his seemingly useless Evasion ability can do much more than simply help him avoid attacks.
By exploiting the skill, he can pass through the walls of boss rooms.
This discovery leads to what appears to be a major loophole in the dungeon system.
Normally, certain rare rewards are designed to be obtained only after clearing a boss or completing a particular dungeon challenge. However, Henri discovers that he can enter these areas through the walls and collect rewards that should normally be limited to a single successful clear.
In other words, Henri discovers a kind of “wall-passing bug.”
Instead of becoming stronger through conventional combat, he uses his knowledge of the dungeon’s mechanics to repeatedly obtain valuable rewards.
This completely changes his prospects.
The boy who was once dismissed as an incompetent adventurer now has access to resources that even stronger adventurers cannot easily obtain.
From the Weakest Adventurer to a Rising Power
The central appeal of the anime lies in Henri’s unusual path to becoming powerful.
He does not begin as a legendary warrior.
He does not possess an overwhelmingly powerful magic ability.
He is not immediately recognized as a hero.
Instead, Henri starts at the very bottom.
His strength comes from observation, creativity,y and his willingness to experiment with the limits of his ability.
The “wall-passing bug” allows him to bypass conventional dungeon progression and repeatedly collect valuable rewards. As he continues exploiting this unusual mechanic, he gradually gains the resources necessary to climb the adventurer rankings.
This gives the series a different approach to the familiar “weak-to-strong” fantasy formula.
Rather than simply training harder than everyone else, Henri uses an unexpected loophole to overcome the limitations that initially define him.
His Relationship With Eleleth Is at the Heart of the Story
Although the dungeon mechanics and fantasy elements are an important part of the series, Henri’s relationship with Eleleth provides the emotional foundation of the story.
Eleleth is Henri’s younger sister and suffers from poor health.
Because Henri has no other way to support his family, becoming an adventurer is not simply a dream or an adventure for him. It is a responsibility.
Every risk he takes is connected to his desire to give Eleleth a better life.
This makes Henri’s progression more meaningful.
His goal is not simply to become the strongest adventurer in the world. He wants to earn enough money and obtain enough resources to protect the person most important to him.
The anime is therefore expected to balance dungeon action and comedy with the emotional bond between the two siblings.
Riko Aonori Voices Henri
Riko Aonori has been cast as Henri, marking her involvement in the protagonist’s journey from an underestimated adventurer to a powerful figure.
In her comment, Aonori highlighted Henri’s determination to protect his sister and the importance of the sibling relationship.
She explained that watching Henri repeatedly put his own safety aside for Eleleth made her appreciate the story’s portrayal of family bonds and unconditional love.
Aonori also said that she felt encouraged by Henri’s growth while reading the scripts.
Her comments suggest that Henri’s emotional development will be just as important as his physical progression.
As Henri gradually discovers the potential of his ability, viewers will get to see how his confidence and determination change alongside his growing strength.
Momoka Terasawa Voices Eleleth
Momoka Terasawa will play Henri’s younger sister, Eleleth.
Although Eleleth is physically weak, she is described as a cheerful, kind, nd and courageous girl.
Terasawa emphasized the character’s combination of fragility and strength, describing Eleleth as someone whose personality makes viewers naturally want to protect her.
The actress also highlighted the importance of the siblings’ relationship.
Because Henri’s motivation is closely connected to Eleleth, their interactions will likely play an important role in the anime.
Their bond could also help distinguish the series from other dungeon-based isekai stories, where the protagonist’s motivation is often centered on personal ambition or defeating an ultimate enemy.
Anime Staff Revealed
The production team has also been announced.
Haruki Kasugamori will serve as director, while Hiroshi Hosokawa will handle series composition and scriptwriting.
Animation production will be handled by Durandal and Tengu Koubou.
The team will be responsible for translating the manga’s dungeon mechanics, action sequences, and character relationships into animated form.
One of the biggest challenges for the adaptation will be making Henri’s “wall-passing bug” visually understandable.
Because the central idea involves exploiting the rules of a dungeon system, the anime will need to clearly show how Henri’s ability works and why it gives him such an enormous advantage.
Why the “Wall-Passing Bug” Concept Is Interesting
The phrase “wall-passing bug” immediately sets the series apart from more conventional isekai anime.
Many fantasy protagonists become powerful because they receive an overpowered skill, legendary weapon, or special blessing.
Henri’s situation is different.
His original ability is considered weak, but he discovers that its interaction with the dungeon environment creates an unexpected advantage.
This means the story’s progression is partly based on understanding the rules of the world.
For viewers who enjoy game-like fantasy settings, the concept could be particularly appealing.
Dungeons have rules.
Rewards have conditions.
Boss rooms have restrictions.
And Henri discovers a way to exploit those systems.
His journey therefore feels less like simply receiving a cheat ability and more like discovering a hidden mechanic that nobody else noticed.
The Manga Has Already Surpassed 1 Million Copies
The popularity of the original manga is another reason the anime adaptation is generating interest.
The series has reportedly surpassed 1 million copies in total circulation, demonstrating that Henri’s unusual adventure has already built a significant readership.
The anime adaptation could introduce the story to an even wider audience, particularly international viewers who enjoy isekai anime, dungeon fantasy and underdog protagonists.
The 2027 television release will also allow new viewers to discover the manga’s world and characters through animation.
“The Weakest Boy Rises to Power With a Wall-Passing Bug” Anime: What We Know
Anime Title
“The Weakest Me Rise to the Top with a Wall-Passing Bug If I Slip Through Walls, I Can Collect the First Clear Rewards Infinitely!”
Release
2027
Format
TV Anime
Original Work
Manga serialized in Magazine Pocket by Kodansha
Director
Haruki Kasugamori
Series Composition & Script
Hiroshi Hosokawa
Animation Production
Durandal × Tengu Koubou
Main Cast
Henri: Riko Aonori
Eleleth: Momoka Terasawa
Manga Circulation
More than 1 million copies
What to Expect From the 2027 Anime
The upcoming adaptation has several elements that could appeal to both experienced isekai fans and newcomers.
An underdog protagonist: Henri begins at the bottom rather than as an instantly powerful hero.
A unique ability: His Evasion skill becomes extraordinarily useful once he discovers its hidden application.
Game-like dungeon mechanics: The story revolves around dungeon rewards, boss rooms, and an exploit that changes Henri’s progression.
Family-driven motivation: Henri’s desire to protect Eleleth gives his adventure an emotional purpose.
A gradual power-up: Rather than becoming unbeatable immediately, Henri’s strength develops as he learns how to exploit his unusual advantage.
For beginners, the premise is simple: a boy everyone considers useless discovers a strange loophole that allows him to obtain rare rewards repeatedly, and he uses that secret to change his life and protect his sister.
Final Thoughts
“The Weakest Me Rise to the Top with a Wall-Passing Bug” offers a fresh twist on the familiar weak-to-strong fantasy formula.
Henri begins as an adventurer with almost no useful abilities and is even rejected by his own party. However, his determination to care for Eleleth leads him to discover a hidden use for his Evasion skill.
What looks like a useless ability becomes the key to an extraordinary dungeon exploit.
With Riko Aonori as Henri, Momoka Terasawa as Eleleth, Haruki Kasugamori directing, Hiroshi Hosokawa handling the series composition and script, and Durandal and Tengu Koubou producing the animation, the 2027 TV anime will be one to watch for fans of fantasy and isekai adventures.
As more information about the release date, additional cast, staff,f and promotional materials is announced, the anime’s unusual “wall-passing bug” mechanic and Henri’s journey from the weakest adventurer to a rising powerhouse are likely to become major talking points.
