Itazura Ippai Imouto no Kokoro wa Wakaranai kara Gaman Shinai!

A young man lives with his little sister, who constantly teases him with playful pranks. She doesn't understand her own feelings, but she knows she wants his attention. Her innocent yet provocative actions push the boundaries of their sibling relationship, leaving him struggling to maintain his composure.

As her teasing becomes more daring, he finds it increasingly difficult to hold back his own desires. The line between sibling affection and something more blurs, leading to a tense and intimate confrontation between them.