Lovely, Still (2022)

Both are mini dramas with the same actor and actress as the main couple. In both dramas, the ML dies or is presumed dead, and the FL travels (to another city or back in time) to encounter him again).

Both are about an unexpected encounter and brief love story that ends when the ML is believed to have been killed in an accident. Both FLs have difficulty moving on, and years later they cross paths with the ML who has a new identity and many secrets.

Both are short length dramas with the same actor as the ML. In both the couples are separated for years due to misunderstanding/lies, and then unexpectedly cross paths again, with one of the leads discovering a shocking twist (in LS the FL discovers the ML who she thought was dead is alive and living under a different name, whereas in LE the ML discovers the FL was pregnant and still in love with him when she rejected him those years ago and is currently raising their young daughter).

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.