Midareuchi

Kitamura Kaori is the president of her school's tennis club.

There's a tennis tournament coming up soon, but one of her juniors, Sasaki Ami, has been missing from all of the training sessions lately.

Out of concern, Kaori wants to pay her a visit.

When she arrives at Ami's, Kaori rings her doorbell, but Ami is just about to have fun with a man.

She doesn't like the presidents since she's never been able to beat her, so Ami lets Kaori in and Kaori sees her sleeping with a man.

Kaori is overwhelmed and asks what that is about, but suddenly the man makes his way in her direction.

What is happening?