During the summer break of my third year, having lost my mother at an early age and constantly moving from school to school with my frequently transferred father, I fell behind in class and was required to attend a five-day summer remedial session. The teacher in charge, Yumi Anno, resembled my mother in both appearance and personality—gentle, warm, and comforting. One day, a chance incident brought us closer together. After class, trapped in a classroom with a broken air conditioner, we spent sweltering hours drenched in sweat, gradually forming a quiet emotional bond. But with my father's next transfer, I faced yet another move—would this connection come to an end?