If you were given the choice between Kasumi Tsukino (black-haired long-breasted) and Alice Otsu (blonde short-breasted), which one would you pick? The ultimate love triangle begins here! ... After confessing his feelings to classmate Kasumi Tsukino and being rejected, protagonist Yūsuke thought their friendship would remain unchanged. However, things took an unexpected turn when Kasumi invited him over to her room while she read manga. In the room, they played games together while lying on the bed next to each other. Upon returning home, Yuusuke found himself drawn closer to Alice but still couldn't shake off his feelings for Kasumi. One night, he began masturbating on the bed where Kasumi had been earlier, unaware that Alice had returned. She caught him red-handed and initiated sex with him. As they started dating, excited about their new relationship, Kasumi also approached Yuusuke, asking for another chance. Caught up in this whirlwind of emotions and desires, all three characters find themselves constantly switching roles - pursuing, rejecting, and being pursued again in this thrilling story of love, lust, and betrayal.