W Exclusive Lesbian Collaboration: "Is Having Lesbian Sex With A Female Friend In Revenge For My Boyfriend's Cheating Considered Self-Defense?" ~The Construction And Practice Of A Flawed Logic That Claims This Is Not Cheating, But Just A Game~ Sumire Kuramoto, Wakana Misono

It seems that her boyfriend of four years with Waka is cheating... Waka's beloved junior, Junren, can't forgive this and confronts Waka's boyfriend, but he skillfully dodges her. So she stakes out to get evidence and witnesses Waka's boyfriend and his mistress entering a love hotel! She tries to spy from the next room, but gets curious about the vibrator and dildo in the room... Before she knows it, the two of them are unconsciously touching each other's bodies...