When cold-hearted mafia heir Chi Cheng starts sending anonymous love letters, a mistake leads them to playful and innocent Wu Suo Wei. What starts as a misunderstanding becomes a forbidden attraction, filled with jealousy, danger, and the violent world of mafia wars. Between loyalty and love, can a mafia prince protect the boy who stole his heart?

Wu suo wei has one goal: survive university, keep his scholarship, and graduate so he can give his mother the life she deserves. That means no distractions, no trouble, and definitely no involvement with people like Chi Cheng - the wealthy, chain-smoking bad boy who somehow got stuck with a private dorm room. But a mistake at the admin office changes everything. Forced to share the same space, Wu suo wei learns quickly that Chi Cheng doesn't let people close. He doesn't share, doesn't care, and definitely doesn't do favors. So why did he let Wei Wei stay? Between cigarette smoke and late-night silences, the line between annoyance and something else begins to blur - and Wei Wei realizes "temporary" might last longer than either of them planned.