"You're seriously too erotic..." "Are you what they call having a strong libido?" Yui, who always felt unsatisfied with sex with her boyfriend, was told this by her boyfriend, which made her wonder if she was a pervert. Later, when she saw her boyfriend humorously talking about sex with her to his classmates, she said, "You're the worst..." "Someone like you..." "I'm turning you down!" and they broke up. Then... "Yui-chan, it's been a while." She reunites with her cousin who is staying at her house for a while for job hunting. "...Your eyes are red, aren't they?" Her cousin, who she hasn't seen in a while, is as kind as ever and notices the small details. And she can't help but think... "How should I put it... I broke up with my boyfriend..." Her cousin listens to her kindly and then...