Ikumi Haruhara, a married woman teacher who has been appointed as a new physical education teacher.
Her neat facial features and her outstanding proportions instantly captivate the boys.
A man who sees Ikumi with distorted eyes. The man once trained Ikumi’s best friend and fell into sex ○○ Shiro Yasuno!
He smiled suspiciously at the appearance of a new prey, Ikumi Haruhara.
One night, Ikumi searches the desk of Shiro Yasuno, who has long been suspicious of her, to find clues to her disappeared best friend.
But then! Ikumi is detained and loses her consciousness by Shiro who was ambushed.
When she woke up, it was a special instruction room that Shiro had built in the old school building!
Ikumi who bullishly curses Shiro while hiding her anxiety.
But at that time she was still unaware of Shiro’s fear of training.