Grinding Teeth (S04E09)

An office lady uses some of her paid leave to go on a trip with her coworkers, but during the trip, she develops a toothache. Hoping to get it fixed even though she's on vacation, she visits a local, old-looking dental clinic. The dentist takes one look at her tooth and shoves pliers into her mouth to pull it without asking for her approval... (Crunchyroll)