A “monster” has taken possession of the body of his deceased younger brother, Seo Ji-U, who was obsessed with him. The monster proposes that it will leave the body if he has sex with it four times. Do-Hyun is falling apart, torn between fear and hatred of his brother and this unknown entity, and a longing for his family...(Source: Ridibooks, translated)
Note: Part of Lucent's Cheunggan X-eum Danpyeonseon (층간X음 단편선) Collection.
— Description from AniList community (anilist.co).
