Since middle school, best friends Takashi and Katsuya always did homework together at Katsuya's house. Their routine included Misato, who would come by to serve coffee. One day, Katsuya had to work a part-time job and left Takashi alone with Misato. Left alone together, Takashi's emotions intensified, and he finally made a move on Misato. After that, Takashi continued visiting as usual, but Misato struggled to maintain her position as his teacher, insisting on keeping professional boundaries. Deep down, Misato silently prayed, "Teacher, please... make me forget everything..."