The highly anticipated “light anime” adaptation of Tenma Asahi’s boys’ love (BL) isekai light novel series, Saioshi no Gikei o Mederu Tame, Nagaikishimasu! (In Order to Love My Most Beloved Brother-In-Law, I’ll Live a Long Life!), is set to premiere in January 2026, with prominent voice actors Ayumu Murase and Shōta Aoi confirmed for lead roles. Murase will lend his voice to the protagonist Alba, while Aoi will portray the beloved step-brother Orsis.
A New BL “Light Anime” Project for January 2026
The “light anime” series, produced by Imagica Infos and Imageworks Studio, marks a significant development in the Boys’ Love genre and is the inaugural project for the newly formed “Balloon” label. The Balloon label is a collaborative effort by IMAGICA Infos, Dai Nippon Printing (DNP), CYBIRD, and BLUE RIGHTS, aiming to create animation with a “light” production model, which suggests a shorter or lower-scale approach to emphasize emotional storytelling and stylized direction at a potentially lower cost and timelier schedule than traditional anime. The series is scheduled to broadcast in Japan starting in January 2026.
Plot and Premise: Isekai, Reincarnation, and Brotherly Devotion
The story of Saioshi no Gikei o Mederu Tame, Nagaikishimasu! blends elements of isekai (another world) reincarnation with heartfelt Boys’ Love storytelling. It centers on a protagonist who, after dying in his original world, is reincarnated into an otome-game-like setting as Alba, the son of a poor noble family. In this new life, Alba is introduced to his new step-brother, Orsis, who happens to be his favorite character from the game he played previously.
Alba’s initial excitement turns to determination when he realizes that his character’s tragic death is destined to be the catalyst for Orsis losing his smile. Armed with this knowledge, Alba resolves to defy his predetermined fate and live a long life, all to protect and cherish his beloved step-brother and prevent the heartbreak that would befall Orsis. This unique premise, focusing on devotion and the struggle against destiny, has garnered anticipation among fans of emotional and fantasy-driven romance narratives.
Key Voice Cast: Ayumu Murase and Shōta Aoi
The announcement of Ayumu Murase as Alba and Shōta Aoi as Orsis has been met with enthusiasm by fans. Both voice actors are well-regarded in the anime industry for their ability to portray a wide range of characters, particularly in roles requiring nuanced emotional expression. Ayumu Murase is known for his roles such as Shoyo Hinata in Haikyuu!! and Kageyama in Mob Psycho 100. Shōta Aoi has voiced characters like Ai Mikaze in Uta no Prince-sama and Licht von Grannzreich in The Royal Tutor. Their involvement is expected to bring significant depth to the central relationship of the “light anime.”
Production Details and Creative Team
The “light anime” adaptation is being directed by Yūsuke Morishita, with Izumi Tezuka overseeing the series scripts. IMAGICA Infos and Imageworks Studio are handling the animation production, and Kazuya Takahashi serves as the production supervisor. The project is also being produced by DNP and Imagica Info’s Animation ID.
The original light novel series, written by Tenma Asahi and illustrated by Kazuaki, began serialization online on AlphaPolis’ website in September 2021. AlphaPolis later published the series under their &arche Novels b and &arche Novels imprints, with five volumes released as of January 2025. A manga adaptation, illustrated by Aki Tsujimoto, started its serialization online via AlphaPolis’ &arche manga website in January 2024.
Fans can look forward to the debut of Saioshi no Gikei o Mederu Tame, Nagaikishimasu! in January 2026, as this “light anime” promises a unique blend of fantasy, reincarnation, and a deep emotional narrative within the Boys’ Love genre.
