Both are about a woman with multiple personalities and her supportive boyfriend with childhood connection.

Both females found themselves having little time to become mothers and actively start searching for a candidate to be baby's father.

1) Both are sports dramas set in college
2) Both MLs were bullied by FLs when they were young
3)Both FL study the same subject
4)Both FLs work for the sports team of the ML
5)Both have the same actor a the coach of the sports team.
6)Both SMLs disappear suddenly.

Both of these Thai series have the same vibes with female lead becoming a male by soul swapping or transformation.

Both the couples meet when they seat in adjacent tables alone in a restaurant and they sit together to save table space. In both dramas the FL is still in love with her ex and the ML is younger.

The both dramas have female lead from modern world enters a historic setting via a video game using virtual reality.

Both are Japanese dramas focusing on relationship between two men, one of the men being a writer of erotic novels.

Both are Japanese dramas unveiling the forces behind a cult organization, While Untouchable is about a female journalist trying to find out the people being a charity organization, Meinai Kao is about a male university professor trying to find out the culprit behind his wife's death.

Both are fantasy dramas involving time loop and characters gaining awareness of that fact. While Extraodinary You focuses on school life Feel Good To die is about a corporate office of a chicken conglomerate.

Not sure why exactly, but synopsis of Jao Gum Nai Wen reminds me of Blood & Treasures. Both are about husband sacrificing their wives and they reincarnate and seeks revenge.

Both are about a people in a boarding house in South Korea mainly having international students including from Japan who tries to acclimatize themselves with the culture of the host country. In Rainbow rose the FL's family runs the boarding house with ML being the exchange student from Japan , in My Tutor Friend 2, the ML's family runs the boarding house and the FL is a student from Japan

Both dramas are about lawyers ans their assistants and how they grow both in career and character because of each other