I absolutely shouldn't have touched her too cute girlfriend who tempted me to have an affair and indulge in sex! Masami, my girlfriend who lives together, was supposed to leave the room for about a week for a trip and I was supposed to be alone for the first time in a long time. However, I got close to Yuuki, her friend who came to the drinking party she opened before leaving, and took the opportunity while she was drunk and asleep. And after she left for her trip, Yuuki came to play again and started a cohabitation life of having sex every day until she came back a week later...