Hello, I'm trying to find out the title of a manga I stumbled upon recently then forgot about. It starts in a highschool then the main protagonist and some girl get stuck in a shed, I think them she ends up peeing in a bucket/bottle then they manage to get out and promptly get attacked by zombies. Wheat was distinctive about the zombies was that they had maggots coming out of their eye sockets and other facial orifices. Does that ring a bell to anyone? Thank you.

Ithink the one you're looking for is Infection by OIKAWA Tooru. I hope this helps.