I don't know it but this sounds interesting and I'd like to know as well! (๑•ㅂ•)و✧
I think you're looking for Reversi. It was on Lezhin before but I can't seem to find it now.
That sounds familiar, it's probably it!! I searched on Lezshin earlier, trying to look for it cause I knew I'd read it on Lezhin, I don't think I saw Reversi on it.... :(
Ah, it's been discontinued..... :c
It's mainly about two boys, I don't think it's BL/yaoi/shounen ai though, they're both in high school. In that world there are like, monsters or virus things and there are people with special abilities to fight them. There are special fighting forces and one of the MCs wants to get in because he was saved by someone (a girl), who is in it, the other MC is his best friend. Things I remember about it:
One MC is short and the other is tall and strong
For some reason they were in a laboratory when they were young, everyone with a special ability was, they get these bracelet things that help them survive and eventually they don't need them anymore but for some reason the short MC still does. It's powered by something and when it's turned off, he'll get a blood nose and fever and die or something?
Tall MC has an older sister.
They have to do a trial/test to be accepted into the special academy or something, there are other people in the school that are also trying to do in. Tall MC gets hurt in this because he was kicked in the ankle by someone really strong.
Short MC betrays tall MCs trust by telling his secret sometime, but they become best friends again.
A monster broke into the school and the special officers get injured, some students are trapped with them and they can't open the barrier in fear of the monster getting loose.