One day, Miyu is a female college student who is informed by her mother that she has a half-brother. Miyu's father, who divorced when he was young, married another woman, but she disappeared after giving birth. And the other day, his father died, and he wanted to take over and raise him who had no relatives. Then Yuya, a younger brother, comes home, but Miyu, who couldn't see the situation because he couldn't get used to the new environment, probably because he grew up in a man's family, gently touched his chest to cheer him up. I'm trying ...