It will be made into a “light anime” developed by Dai Nippon Printing.
(C) Asahi Tenma, Tsujimoto Tsugu, Alphapolis/”Saioshi” Production Committee
It has been announced that the light novel “I’ll Live Long to Admire My Most Favorite Brother-in-Law!” will be made into a TV anime in 2026. It will be produced as the first work of the “BALLOON” project, which turns boys’ love works into light anime.
The story is about a former company employee who is reincarnated as the son of a viscount in the world of a girls’ game, and struggles for his favorite character, Orsis, who has become his brother-in-law.
The full text of the comments from the original creators is as follows.
[Asahi Tenma (original author)] Nice to meet you all. My name is Asahi Tenma. Thanks to everyone’s love for “I’ll Live Long to Admire My Most Favorite Brother-in-Law!”, we have decided to make it into an anime. In the main story, Alba is working hard as a high school student, her brother’s fiancee, and a magic circle engineer, but I hope that you will enjoy watching Alba’s efforts (to love her favorite brother) in the anime, which will remind you of how difficult it must have been when she was little. I also hope that you will save Alba’s personal story, with its voice and movements, in your albums. I am truly grateful to everyone who supported me. Thank you! Please continue to enjoy the novel and the comic adaptation, “I’ll Live Long to Love My Most Favorite Brother-in-Law!”.
[Tsujimoto Tsugu (in charge of comic adaptation)] Congratulations on the anime adaptation! The original is such a wonderful work that it seems natural that it would be adapted into an anime, but I still can’t believe that the manga I drew was able to become one step towards that goal. It was a lot of trial and error, but thanks to everyone who supported the work, we were able to get to this point. I am truly grateful. Thank you so much.
[Kazuaki (original illustrator)] I’m excited to be the original illustrator for Alba and the others, as they will be in a light anime! If her favorite guy started moving and speaking, Alba would probably lose consciousness (lol)
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Light Novel Comedy Joins BALLOON Project as First Entry
The announcement of “I’ll Live Longer to Admire My Favorite Brother-in-Law!” as the first installment of the BALLOON light anime project signals a bold shift in how romantic comedy and slice-of-life stories are being adapted for modern audiences. With its quirky premise—centered on a reincarnated girl whose sole goal is to admire her brother-in-law—it blends humor, emotional growth, and the “push-your-OTP” trope in a refreshing way. This could mark the rise of short-form, emotionally rich anime content with broader accessibility, especially targeting younger audiences and casual anime fans.
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