The official website for the upcoming “light anime” adaptation of Tenma Asahi’s Saioshi no Gikei o Mederu Tame, Nagaikishimasu! (In Order to Love My Most Beloved Step-Brother, I’ll Live a Long Life!) light novel series has streamed its first teaser video, confirming a January 2026 premiere in Japan. The series is an adaptation of the popular boys’ love (BL) isekai fantasy light novels.
A Glimpse into the World of Alba and Orsis
While specific details about the content of the teaser video were not extensively detailed in the search results, the announcement of its release signifies a significant step in the anime’s production. New key visuals for the series have also been revealed. The “light anime” format itself is a newer production model, spearheaded by Dai Nippon Printing (DNP) to deliver animation at a lower cost and on a more “timely” schedule, emphasizing character appeal and emotional storytelling.
Unraveling the Plot: Reincarnation, Otome Games, and a Fated Death
The story of Saioshi no Gikei o Mederu Tame, Nagaikishimasu! centers on a young man who is reincarnated as Alba, the son of an impoverished aristocratic family within his favorite otome game. In this new life, Alba is introduced to his new step-brother, Orsis, who happens to be his absolute favorite character from the game.
Alba’s initial excitement turns to dismay as he remembers a crucial detail: his own character’s tragic death in the game is the catalyst for Orsis losing his smile. Armed with this knowledge, Alba is determined to defy his predetermined fate and avoid death to ensure Orsis’s happiness and continue to dote on his beloved step-brother. This blend of isekai reincarnation themes with heartfelt Boys’ Love storytelling, coupled with Alba’s struggle to change his sickly and short-lived destiny, forms the core of the narrative.
Key Cast and Production Team
The main cast for the anime has been revealed, with Ayumu Murase taking on the role of the protagonist, Alba. Shouta Aoi will voice Orsis, Alba’s cool yet gentle step-brother.
The “light anime” adaptation is being directed by Yusuke Morishita. Izumi Tezuka is responsible for the series composition. Animation production is handled by Imagica Infos and Imageworks Studio. The series is the first “light anime” project from the new Boys’ Love animation label BALLOON, which is a collaboration between IMAGICA Infos, Dai Nippon Printing, CYBIRD, and Blue Rights. AnimationID is also involved in the production.
Source Material: Light Novel and Manga
The anime is based on the popular Boys’ Love light novel series written by Tenma Asahi and illustrated by Kazuaki. The web novel began serialization in September 2021, with AlphaPolis publishing the print light novel volumes starting in November 2022. Five volumes of the light novel have been released as of January 2025, with the sixth volume scheduled for December 12, 2025.
A manga adaptation, illustrated by Aki Tsujimoto, began serialization online via AlphaPolis’ &arche manga website in January 2024. Two tankōbon volumes of the manga have been collected and released as of July 2025. Fans looking to delve into the original story before the anime’s premiere have both the light novels and manga available.
