both are BL series with the roommates trope : ROP304 only has one couple, and it's the main, KKB will have (i think) at least one couple created thanks to the "roommates" trope so this will be their similarities
ROP304 is more related to an opposite/ennemies to lovers, with also the work place as an important think
KKB's characters are all friends but working at different places

both are Korean GL released by SUKFILM on their youtube channel !! i recommend both of them if you like short, well-writed web series :)

they both have the same production studio (SUKFILM on youtube), one is a GL while the other one is a BL, but i promise they both have great chemistry, acting and storyline !!

they're both korean BL that take place in university, one of the character is willing to be close to the other one that don't really want someone in their life (friend or boyfriend), and we also have the "classic" antagonist who also wants to flirt with one of the characters :)
we all know that Semantic Error is strongest in the term of budget, character development or quality of acting but i promise that Blossom Campus is worth the detour, it's really an endearing series that I enjoyed

those both korean BL have a sunny, smile and endearing character, Choco or Yoon Chan, so it gives to the couple a cute dynamic, with their opposite partner with a colder personality !!

they both have the same director !! except this, they're both smooth korean BL, that you can watch as a chill TV series on a sunny sunday

the special one is following their story after the series, it feels good to see them together again, with new scenes !! <3

They're both thai BL and have the "friends with benefits" trope
idk much about wandee's story bc it's still airing, but i think if you like this trope you'll like both series :)

Friends with benefits trope, i love both main couple, they're attractive asf :)
They're both thai !!

Both are having a secret crush abt a close friend, Boys Be Brave is korean while Secret Crush on You is thai, but they both have a good plot, with great actors !!

They both have the trope "friends to benefit" to start the relationship :)
Pitbabe & Fahlanruk aren't that similars but if you like this trope you'll love both of them !!

They're both thai BL which have :
- Undercover Identities : Both series involve characters assuming different identities to uncover secrets or protect loved ones
- Complex Relationships: Whether it’s brotherly bonds or romantic entanglements, both dramas delve into intricate connections.
- Emotional Depth: Both explore themes of trust, betrayal, and sacrifice