Kinshin-san Irasshai

Kaito, a young man living alone, suddenly receives a visit from his cousin, a beautiful girl named Mio. She claims to have run away from home and asks to stay with him. Despite his surprise, Kaito reluctantly agrees to let her move in.

As they begin living together under the same roof, the boundaries of their relationship start to blur. Mio's affectionate and forward behavior challenges Kaito's sense of propriety, leading to increasingly intimate situations. The daily life of the two cousins becomes a series of tempting encounters that test their familial bond.