Uruka Takemoto has been Nariyuki’s friend since middle school and is also a swimming prodigy who should have a brilliant future ahead of her. But, her academics have languished to the point that she’s in danger of losing the college scholarship she’s been counting on. With an order from the principal, Nariyuki must now tutor her, too.
　Uruka hates studying, but suddenly becomes eager when she hears that Nariyuki is going to be her tutor. It turns out that she’s been in love with Nariyuki, who has always accepted her for who she is and has helped her since middle school. Uruka gets fired up seeing her fellow mentees, Fumino and Rizu, as her rivals.