Kume, a student, has always been in love with Mr. Hiwasa, a cram school teacher.

At the time, Hiwase had a fiancée, so he kept his love for him to himself.

One day, Kume, now a medical student, runs into Hiwase on the street and learns that he is unmarried.

He confesses, “I've always loved you, ever since high school,” and with a fierce appeal, they begin a trial relationship!

Sensitive to pleasant things and vulnerable to pleasure, Kume and Hiwase decide to make love from the inside out. ......?

A young seme and an instructor's erotic love story!