Baek Ji-Won had been tormented by strange noises coming from behind the wall. Upon discovering that the source of those sounds was Lee Hae-Sung—who had been secretly watching him all along—he finds himself torn between revulsion and sympathy. Will Ji-Won ultimately be able to accept Hae-Sung’s twisted emotions and his peculiar way of loving him…?(Source: Ridibooks, translated)
Note: Part of Lucent's Cheunggan X-eum Danpyeonseon (층간X음 단편선) Collection.
— Description from AniList community (anilist.co).