만 오면

if/when [someone] comes

→ 만
phrase Rare #17,122
if/when [someone] comes 만 means “only” or “just” and emphasizes the word or phrase before it; the exact meaning depends on context.
KO: 네가 집에만 오면 같이 저녁을 먹자.
EN: If you come home, let’s have dinner together.