help me find this manga

or webtoon? i think it was colored. i read it a WHILE ago so my memory sucks but i’ll describe it as best as i can.

basically it’s about some students who were in school when all of the sudden ppl started becoming zombies. and they were all like running but the MC stayed back to help this one girl and he ended up getting bit (this is all happening in school btw).

he turned into a zombie but his mind was still human although sometimes he had a hard time controlling himself.
i think some of the zombies were smart, like one could drive a truck it was pretty creepy. it was ongoing, i’m pretty sure about that.