Makoto, who was still an apprentice at school, found himself caught up in a situation involving Yurina Ryokaze, a popular art teacher. Yurina, who was married with her husband working in Italy, was temporarily assigned to the school due to her father’s illness. As fate would have it, Sakakura, a senior student at the university, introduced Yurina to the school and developed an unusual affection for her. Together with Yasuno, who shared a mutual sympathy with them, they hatched a plan to train and entice Yurina.
Everything seemed to be going according to their plan until Yurina received an unexpected order from the director to participate in an exchange workshop. On the day of her departure, Sakakura offered Yurina a cup of recommended black tea. Little did she know, the tea had a sleeping drug. As Yurina took a sip, she started feeling dizzy, her vision darkened, and she eventually fainted.