Ryota, who lives with his father, recently broke up with his fiancée and became depressed. - Under such circumstances, his father was having a hard time introducing his new partner, Momoko. - 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 started to regain his energy, and Momoko saw this and started having more physical contact with him day by day...