Seo-Jin, colorless and odorless, unaware of favorite music or colors, encounters Ju-Hwan, radiant with five-colored hues. The moment Seo-Jin sees Ju-Hwan, he falls in love, yet Ju-Hwan's heart remains unknowable. Just when he thinks they're growing closer, he pulls away; when he can barely see him, he returns to his side. Seo-Jin can't make sense of it.
Obsessed with Ju-Hwan, he stops attending school and squanders his tuition money, only to be caught by his parents. As punishment, Seo-Jin is sent into a kind of exile during the vacation. Waiting at his destination is the enigmatic owner of the mansion, Sa-Yun. Seo-Jin enters Sa-Yun's daily life, accustomed to solitude. Just as their life together begins to feel natural, Ju-Hwan arrives at the mansion. Watching them closely, Ju-Hwan senses a subtle shift in the atmosphere...
A mansion where past and present intersect, and the precarious drama of three men!(Source: KakaoPage, translated)
— Description from AniList community (anilist.co).