Recommendations

Nostalgic romance
Male leads join revolutionary movements during their college years
Vintage vibes, one set in the 80's, the other one in the 90's

Both shows feature an idol group that works to their debut by going through missions and performance evaluations with the threat of member eliminations if they fail. In both shows, the groups work hard to debut with all their respective members.

Road to Kingdom is a survival music competition that features Pentagon as one of the contestants. Pentagon has some amazing performances on RTK, and it's fun to watch.

two boys start live together against their will after meeting each other by chance in a very unusual way.

ML is a supernatural doctor...
ML has been waiting for the FL for a long time after he lost her in the past.

Both dramas have sweet stories. In both ML is CEO of a company who is kind of awkward with people and FL is bright and optimistic.

Similar atmosphere, successful and awkward ML, bright FL who at first didn't have a good impression on ML but gradually becomes to like him.

Both dramas have ML who is kind of unsociable and rude towards others while FL is bright and nice to everyone. Similar kind of storytelling and progress of the relationship between ML and FL.

Both are written by the same author, they are both BL and happen in a Xianxia setting. So you get cultivators, and period costumes, and adventure as well as that BL romance.

Same premise of gay couple who have a child and their struggles in both exploring how to explain their unique family to their child and their child's exprience at school.

Bothe Male leads have hyperthymesia , the ability to remember an abnormally vast amount of their life experiences in vivid detail.

Both are same stories but different versions.

The newer one stars Mario and Margie and is much more modernisized.

It's another short Korean Boys Love series with a young, attractive couple that have to face their own unique hardship.

~both dramas are again rom-coms
~ML and Fl are completely in love with each other
~Both dramas revolve around business

~Luo Zheng has acted in both of them
~both are fluffy dramas
~ both are Chinese rom-coms
~both stories take place in university
~both are youth dramas
~both dramas have multiple couples