Ryota, who lives with his father, recently broke up with his fiancée and became depressed. Under such circumstances, his father is having a hard time introducing Momoko, his new partner. When he talks to Momoko about this, she says, ``I'll comfort you!'' and the three of them begin living together. Even after his new life begins, Ryota remains closed off, until one day he runs into a naked Momoko in the bathroom. From that day on, Ryota