The TV anime Uchi no Otouto-domo ga Sumimasen has been officially announced to premiere on July 3, airing for two consecutive cours. Alongside the broadcast details, the main cast, key visual, and first promotional video were also revealed.
The announcement was made on March 28 during AnimeJapan 2026, held at Tokyo Big Sight in Tokyo.
Official Trailer:
Key Visual:
CAST:
Naomi Ozora as Ito Narita
Toshiki Masuda as Gen Narita
Taku Yashiro as Raku Narita
Kensho Ono as Syu Narita
Momoka Terasawa as Rui Narita
STAFF:
Director: Hitoshi Nanba
Series Composition: Megumi Shimizu
Character Design: Shiori Hiraiwa / Yoko Fukushima
Music: Gin (BUSTED ROSE)
Production: Lay-duce
Uchi no Otouto Domo ga Sumimasen is currently serialized in the magazine Separate Volume Margaret (Shueisha), and 14 collected volumes have been released so far. Its live-action film adaptation, starring Mei Hata as Ito Narita, premiered in Japan in December 2024.
The story follows Ito, a second-year high school student whose life changes when her mother remarries. After moving into her new home, she discovers that her stepfather has four sons: the eldest Gen, the second son Raku, the third son Shu, and the youngest Rui. Overnight, Ito becomes their older sister. As she adjusts to her new family, she struggles to connect with her four stepbrothers and navigate the challenges of their blended household.
Source: @uchioto_anime
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