Tell Me You've Changed (2020)

Both are mini dramas in which the FL is cheated on by her boyfriend, breaks up with him, and then meets the ML who is her new co-worker in the office.

Both are mini dramas that begin with the FL discovering her boyfriend is cheating on her, followed by her meeting and becoming involved with the ML.

Both are mini dramas with slow and lovely romances, a lot of beautiful scenery, and a wistful, nostalgic feel.