Mr. Swimmer (2018)

both male leads are inexperienced with dating. both go after the ex of their brother/best friend after they figure out that they have fallen for her. the female lead is also dumped because of her family background. there's a secret that if revealed will tear the 2 main leads apart. there also to males after the main female lead who is not sure who to chose the new romance or the old which hurt her in the past.

Similarly a C drama on sports and romance. Both focusing on swimming and competing. My Mr Mermaid is warmer and has other lovely aspects of friendship, and team spirit.

Both lead couple are very handsome and pretty.

Both lead couple is the only child of the family.

The lead actress in My Love from the Ocean and the lead actor in Mr Swimmer are adopted.

Both drama have bromance but slightly different.