Sister Breeder – Episode 1 (EN)

In Sister Breeder OVA #1, step-siblings Reina and Aina have grown up together in perfect harmony, treating each other like true blood sisters. Their peaceful life is disrupted by their new stepbrother Shota, whose overly affectionate skinship quickly escalates—especially toward the younger Aina. What begins as playful touching grows increasingly intense, culminating in secret nighttime visits that push boundaries further. When Reina intervenes to protect her sister by taking Aina's place, she becomes the focus of Shota's relentless advances. Harboring long-hidden feelings for him, Reina experiences a flood of first-time sensations and intense pleasure. The once pure and upright student council president is gradually corrupted and reshaped under Shota's hands, succumbing to waves of ecstasy as her body and mind are molded through repeated, passionate sessions. This episode sets the stage for deeper entanglements among the trio, blending jealousy, protection, and irresistible desire in a story of taboo training and climactic surrender.