Yui from the swimming club was secretly dating Haruma within the same club.
As the tournament approached, Haruma's performance plateaued, causing him stress. Yui kindly supported him. One day, Haruma found out that Hiyori from the same club had feelings for Yui and saw Yui's ambiguous attitude, feeling a strange excitement as he realized his cuckold fantasies. He fed false information to Hiyori, leading to Yui being raped. Haruma experienced abnormal excitement, and his trashy behavior escalated…
