She was away for a week on a family trip, so I creampied her big-breasted friend.

She is seduced by her cute female friend who can't really touch her, and has had sex with her infidelity! Masami, who lives with her, has to leave her room on a trip for about a week, and Makoto is supposed to be alone for the first time in a while. However, she suddenly gets close to her friend Yuki, who comes to a drinking party she holds before she leaves, and when she is drunk and sleeps. After she went on a trip, Yuki, who came back to visit, began living together every day for the week before she returned...