Sister Breeder

Sister Breeder is a hentai anime adaptation of the manga Sister Breeder by popular author Takeda Hiromitsu. Shota is very attached to his sisters Rene and Aina. Every day, he becomes more and more attached to Aina… and eventually he even sneaks into her room at night! Rena tries to stop Shota, but ends up having sex with him instead of Aina. Due to her hidden feelings for Shota and the pleasure of new sensations, the once innocent Rena gradually becomes addicted to sex…!?

Aina discovers that her older sister Rena has become her brother Shota’s sex toy. Unable to bear it, she sneaks into Shota’s room at night…!? Using the lewd techniques she learned by secretly watching him with Rena, Aina tries to take the initiative—but as she experiences pleasure, Aina’s arousal only grows! Along with her sister Rena, Aina also gradually undergoes training and becomes a sex slave…!

“We have become Onii-chan’s exclusive pets.” The sisters Rena and Aina, having both fallen mutually in love with their stepbrother Shota, had already accepted a certain kind of training. He indulges in perverted games anywhere without caring about anything, and the sisters completely fall into depravity… But one day, Aina receives a love letter from another boy, and Shota begins to take an interest in another woman… Will the relationship of the sex pet sisters be destroyed?

Sister Breeder Episode 4 is the fourth installment in the hentai OVA series (OVA シスターブリーダー ＃4), released on February 27, 2026 (censored version primarily, with some sites claiming uncensored leaks or exclusives). Unlike the previous episodes that continued the core “Sister Breeder” incest storyline with step-siblings Shouta (Shota), Rena (Reina), and Aina, Episode 4 shifts to adapt a different doujinshi/manga by Takeda Hiromitsu titled something like “Akuma de Kanojo wa Boku no Tenshi” (Devilish Girlfriend is My Angel) or a similar forbidden teacher-student theme.