Ratio has long been accustomed to the fact that his boyfriend, Aventurin, has poor immunity. Therefore, his bf was forced to miss work at the school of witchcraft and wizardry. Ratio is a potions teacher, and Aventurine — Everyone's favorite broom flying teacher. The students are bored and ask Ratio where their teacher is, to which Ratio replies that “that idiot is sick.”

During his lunch break, he hears a bell and immediately knows who it is.

— Hello. Aventurine, are you a fool?