hi! i'm looking for this zombie apocalypse manga. pretty sure it starts off with mc being ...

hi! i'm looking for this zombie apocalypse manga. pretty sure it starts off with mc being sent to jail, and the story progresses with him and a couple other prisoners (i think?) as they basically make their way through the apocalypse even though it's hinted that relationships were doomed from the start.

i remember that one of the prisoners, while in a perilous situation, had a flashback. he had a super abusive and mentally delirious mom, and would always try to please her. he had glasses and a bowlcut, btw. he would come home and if his grades weren't good, she'd basically whip his palms bloody. at the end of his flashback, it was shown that CPS workers (or cops?) who came to visit his house on child abuse tips, were mentioning how they'll take him away etc and save him. but that just freaked him out because he didn't want to get separated from his mom, so he impulsively murdered one of them and that's the reason why he was sent to jail. while he was cuffed, he saw his mom talking to the neighbours about the spotlight and how she was meant to be a star, because they were gathering due to the attention of the crime.

that's like the most specific thing i can remember about this manga. thanks in advance!