χοιρόθλιψ

Please recommend me a enemies to lovers story but from the male pov, or if bl, then from the top pleaseeee

I remember reading a short survival manga similar to Alice in Borderland, when at the end of each round the people had to go inside a sort of capsule, at the start of the game there was an already dead guy and someone stole his phone to play the game, and between the participants there were an old man and a guy with a knife. If someone knows it pleaseee tell me the name