I'm just broke

I Suddenly remembered this webtoon that I read few years back and I'd like to know if anyone has seen this since I've seen webtoons being re-uploaded in here.


So the story is about where adults had suddenly disappeared out of thin air, and without adults, teenagers and kids where left alone, which made cities into Apocalypse like scenery, since none really knew how to work some things. I think the main character was a pre-teen or a teenaged girl with a little brother? Or a sibling. They live in their house, and the mc is being the adult, I think she knows how to drive? But I'm not sure if I'm correct. I think the kids around her block meet up in a abandoned school to discuss things & etc. If I remember correctly, she was in bad terms with some guy who I think had orange/red hair?

I can only remember the plot the best, I hope this is enough info

Currently looking for the title of an anime, it was about an immortal guy living in the modern world, no I wouldn't say he's an overpowered mc tho. I just felt bad for him, one scene I clearly remember was where people where having an event for water or some shit and when he drank a huge amount of it, his body refused and forced him to throw it up. The water was filled with poison of some sort. If it helps, I'm pretty sure the water was formed into a small ball(?) Some guy that I'm pretty sure was one of his companions realized this and knew other people were gonna take a sip of the water. That's all I remember.

The main character was homeless before and I think there was a flashback abt how he lived with his immortal power. Not sure if I'm correct tho.

I think I remember a glass/falling scene, maybe first episode? He fell out of somewhere..

The mc had black haired and had huge trust issues. I can't remember the lenght of his hair,It's between short or medium length.

Thats all I could possibly remember, I hope this is is enough info.