Shinbi Apartment Episode 72

A monster is seen turning Hari and Hyun-woo into some dark dirt(?) kind of substance and absorb them into itself. Later, Gaeun held off the monster for Doo-ri to escape and her scream implied she was absorbed too and as she returned along with Hari and Hyun-woo after the monster was defeated shows she indeed was.

[This article may need help, the source is in korean and has not been properly translated into english. Help from anyone who understands the source would be appreciated.]