Mo Dao Zu Sh / Grandmaster of Demonic Cultivation

Wei Wuxian is asked (under duress) to babysit a class of tiny Lan cultivators for just a few minutes. A few minutes turns into an hour, turns into two hours, turns into an impromptu literal field trip and now there's an entire class that is weeks ahead of their curriculum, their most junior disciples have apparently imprinted on Wei Wuxian like baby birds, and Lan Qiren has no one to blame but himself.