H na Gishi Series The Animation – Episode 1

A high school boy’s life is turned upside down when his father suddenly remarries. Adjusting to a new family is hard enough, but he discovers his new stepsister is none other than the “Goddess” of his class. She is a girl of captivating contradictions: the shortest student in school, yet possessing the most explosive, head-turning curves (Bakunyuu) that leave the entire student body in awe.

However, the real shock isn’t her stunning appearance—it’s her radical philosophy. Driven by a fierce belief that an older sister’s duty is to “care” for every one of her brother’s needs, including his deepest physical desires, she begins a relentless campaign of seduction.

Living together under the same roof, the poor protagonist finds himself in a constant battle between logic and primal instinct. From dramatic encounters in the bedroom to high-tension moments when their parents are away, his daily life transforms into a series of sinful, adrenaline-pumping experiences that push the boundaries of their new family bond.