Hello, can anyone please help me find this shounen ai? Or maybe bl im not sure, I only rem...

Hello, can anyone please help me find this shounen ai? Or maybe bl im not sure, I only remember parts of it, but this story is part of like multiple stories which is connected with each other, I remember the mc is trapped in like an underground facility where they have to fight of monsters as a test, I remember mc have this rare ability but is classified as like low rank, he met the ml when the group hung out to watch one of the experiments idk, they got closer from like enemies to lovers. The other story is where the mc looked like the girl the ml was trying to find?? So he kidnapped him sort of into their place