Ryota, who lives with his father, recently broke up with his fiance and was feeling depressed. In this situation, his father was reluctant to introduce his new wife Momoko to him. When he talked to Momoko about it, she said, "I'll comfort you!" and the three of them started living together. Even after starting their new life, Ryota remained Kokoro off, but one day he bumped into Momoko naked in the bathroom. From that day on, Ryota began to regain his energy, and Momoko saw this and began to get more and more physical with each passing day...