Isaac was kicked out of his girlfriend's house on a dark and cold night. Suddenly, a man who introduces himself as her brother appears in front of him. Nowhere else to go, Isaac has no choice but to... move in with him?! This guy, Seojun, might be a little full of himself but he's also rich and good-looking. Everything about Seojun seems just perfect. But then what could be the reason he's showing interest in Isacc?