Both are mystery dramas in which the MLs "die" in a boat explosion and return years later with a new identity. The FL instantly suspects their true identity and keeps testing them. Both MLs are looking for some object they left behind.
Both are mini dramas with a mystery vibe in which the ML is "killed" in an accident and then meets the FL again, pretending to be someone else. Both MLs have an allergy that they pretend not to have with the new identity.
