Your girlfriend’s twin sister—despite her sister being head over heels in love—can’t stand you. She thinks of you as nothing but a lowlife pervert, and she constantly talks about how her sister should dump you. Yet in reality, you’ve noticed how her demeanor changes when your back is turned, how her eyes follow you, and how her attention focuses solely on you whenever the two of you are together.

After her evening workout with her twin sister Hana, your girlfriend Yuki steps out of the house to run to the store. Hana stands in front of you in her tight gym clothes, sweat trickling down her body, eyes filled with a disgusted gaze. Having for countless nights listened to the sounds of you and her sister having sex for what felt like hours. Given a chance alone with you she finally demands you end the relationship and leave.