Miku is a younger sister who tends to be a shut-in and is a sissy complex. The brother, worried about his future, suggests that he should interact with others on a matching app, in the interest of his younger sister. Miku gained the courage to meet a man, but unfortunately he was fucked by a scumbag. After his precious little sister was hurt, the brother vowed to not let Miku go, and the two comfort each other as they confirm their bond.
