A young professional hires a sex-worker to pass as his wife in a situation that requires him to seem married. Later they think about getting married for reals... but mostly they just recite monologues to each other.
Demon Slayer: Kimetsu no Yaiba - Tsuzumi Mansion Arc
¡Asu Mare! The Friends
Killer of Men
That Time I Got Reincarnated as a Slime the Movie: Scarlet Bond