In the sweltering heat, summer classes were being held in classrooms with no air conditioning. I thought there was no point in making extra classes, so I slacked off on the bed in the nurse's office. Ayaka-sensei was the only one who didn't abandon me, despite my lack of motivation. Gradually, I began to see Ayaka-sensei, who was so kind to me, as a woman. And so we crossed the line between teacher and student. During the summer vacation, the happy time we spent alone, sweating and seeking each other, was not going to last long...