Young Lady and Gentleman (2021)

S1E2 The Handsome Man In The Mountain

Dan Dan mistakes Young Guk for a charming but deranged criminal, reminiscent of movie villains, and retaliates by striking him on the head with her water bottle. This leaves Young Guk with a cut on his forehead, leaving him confused by Dan Dan's request for forgiveness. In the meantime, Guk Hee encourages Dan Dan to apply for the position of a live-in tutor at Young Guk's residence.