Sakura Ueno has recently quit her job and decided to work temporarily in a nursery school at a friend's request. There she meets a whole lot of cute kids including a girl named Ai. Shindo, the girl's father, often comes to pick her up late after school. Seeing him pick up his daughter triggers a memory of her own father, following this, changes happen…
Yaichi (Ryuta Sato) is a single father and he raises his elementary school aged daughter alone. One day, a foreign man named Mike (Baruto Kaito) visits him. Yaichi has an identical twin brother Ryoji, but Ryoji moved to Canada years ago. They have disconnected since that time. Mike introduces himself as the husband of Ryoji. They are a married gay couple. Yaichi is confused and doesn't know how to deal with Mike.