If U have nothing red this

A dilapidated mansion sits on the outskirts of Seoul. Among its residents are frauds, murderers, and psychopaths, all seeking refuge in the only place that will accept them. But not every resident of the run-down manor has come here by choice. Kim Sungkyung operates a minimart so that he can afford to take care of his parents, who have come down with a malignant disease. Having been born inside the four walls of the mansion, a life of depravity and deprivation is all he knows. The sole thing that gets him through is his obsession with the building’s manager, Kwon Cheong-rim: a cruel and calculating figure seemingly only interested in the preservation of his own wealth and power. So when the enigmatic pretty boy begins to hint at a sort of faint interest in Sungkyung, the latter's obsession begins to grow as a single question echoes ceaselessly throughout his mind: “Why...?”

Having grown up in the same household, Shin Chaon and Moon Sehan were once inseparable. However, everything changes after the two reach adulthood. Between attending college classes, Sehan is busy learning the violent ways of a gang boss like his father. Meanwhile, Chaon has been occupied with his own “extracurricular activities” in hotel rooms to satisfy his inner masochist. But unbeknownst to Chaon, his childhood friend is fully aware of his dirty little secret and he’s had enough. It’s time Sehan stops hiding his sadistic desire to break Chaon and bring him under his complete control...