A female married woman teacher has a sweaty lesson in the middle of summer.

I lost my mother early and continued to transfer schools to my father, who was a transfer family, but I couldn't keep up with the classes and ended up taking part in the summer course for five days. Yumi, the person in charge of repairs, was beautiful, kind and somewhat resembles her mother. Then, after a sudden incident, the teacher and I suddenly got closer, and after class, they secretly began to love each other, covered in sweat in a classroom with broken air conditioning. However, when my father was transferred, I ended up transferring schools again...