so the trope is like ML has crush on SFL then FL help ML to get SFL but they ended up liking each other instead.

it can also that FL has crush on SML and then SML get closer to SFL so FL and ML got jealous and teaming up to win their crush 

its not an asian drama but it has the same storyline => The Lady's Companion.
It literally was just released on Netflix.

Then for asian dramas:
My First First Love
Jealousy Incarnated