Hopeful Star of the Track & Field Club Ai is Completely Corrupted... and...

Keiichi is working as a coach of a school's track and field club.
In past, he repeatedly hooked up with many female students.

But he is now engaged to a female teacher Misaki, and he knows
that he is responsible not to do immoral deeds with students anymore.

However, there is one regret in his mind... that he was not able to hook up
with the hopeful athlete Ai... He is sandwiched between moral and desire.

An opportunity suddenly comes to him. She asks him for a one-on-one lesson.
He accepted her offer without any ulterior motive. or...
More precisely, he THOUGHT he didn't have ulterior motive.

He didn't know that it is going to become the trigger of a love-hate drama...