Romantic dramas with hidden identity

Hi there! I'm not sure if there's a whole lot of dramas that fit this trope, but I'm looking for dramas that have some form of an anonymous relationship. For example, pen pals who fall in love through letters or gamers who fall in love online, but then they meet in real life without knowing who the other is. Or any case of hidden identity that gets revealed eventually.

I just watched the C-drama Everyone Loves Me where two gaming buddies meet IRL, but they don't know that they're actually friends online.

Or like She Was Pretty where the ML doesn't know who FL is at first.

Even like Business Proposal where ML initially didn't know it was actually FL he was going on dates with.

What's wrong with secretary Kim (another drama where FL found out ML was actually whom she was looking for all along)

This is my favorite trope, so I'd really love recs for any drama that fits this trope.

Other dramas I've watched and enjoyed: - Backstreet Rookie - My Demon - Lovely Runner - Her Private Life - Hidden Love C-drama - Hometown Cha Cha Cha - Welcome to Samdal-Ri - Strong Woman Bong Soon - Lovestruck in the city (also has a similar trope of ML getting to know an alternate persona for FL and then finding the real her)