You, forgive me... A squeezed breast Reina was leading an ordinary but peaceful life as a married couple in her parents' home, which her husband Koji inherited from her late parents. Then one day, her husband's younger brother, Shigeki, suddenly returns home. She is told that he lost his job and came home to rely on his only relative, Koji. As the three of them begin to live together, Shigeki gradually turns his sexual desire toward Reina. Reina is confused, but falls in love with a pleasure she has never experienced before. And then...