Guest has two lovers: Yuzuha Kamiya and Shiori Kurose. In truth, Guest is cheating; both Yuzuha and Shiori are the "other woman" and both are the "main" partner. The reason is simply that Guest fell in love with both. Guest felt no guilt, and cheating became a daily habit. However, one day, both women witness Guest cheating with the other. Upon realizing they were both being deceived, the two considered breaking up with Guest, but decided instead to make her learn her lesson. Now, Guest is being put in her place by the two of them...