Are there any bls where the couple is in a secret relationship. And the whole plot of the story is them trying to hide that they’re in a relationship?
Not really but due to their complex relationship they hide it.
https://www.mangago.me/read-manga/love_or_hate_yeongha/
https://www.mangago.me/read-manga/kono_kiss_wa_kiji_ni_dekinai/
Seme was an actor. So you can guess.
The fact that in the raws it ends in a fucking cliffhanger! Now we have to wait until season 3!!!(╯°Д °)╯╧╧