does anyone know of any manhwa or webtoon like this?

If ur looking for school-survival genres then:
- afterschool war activities
- the surviving
- shot gun boy

Night of shadows
School bus graveyard
Homesick

try sweet home!

thank you all!! ill check them all out ლ(´ڡ`ლ)

Survive Romance

One Day, Suddenly, Seoul is

Tenkuu Shinpan

Cage of Eden

I remember reading cage of eden back in highschool that was so good, fuckk, still don't like the ending though, it kind of sucked but eh from beginning up till that it was so good so it didn't really matter