To Love X

Hasol and Jinyul were once each other's exes. After returning to university, Jinyul unexpectedly runs into Hasol again. Uncomfortable with facing a former lover, Hasol tries to avoid him, but then becomes possessed by a ghost that had been stalking Jinyul.

As a result, the two end up doing things they never did back when they were still a couple...

(Source: Lezhin Entertainment, translated)