Hello! Just joined and this is my first post, so please excuse me if I do things wrong here.

I'm looking for a horror manga I read a few years ago (2017-2018-ish) on the Manga Rock app. It was a collection of horror stories, some were urban legends from Japan. I remember one of them was about a dream where you were running in a school hallway(?) and you would be trapped in the dream unless you passed it onto someone else. Another was about this family that ran over a dog and the daughter of the family wanted to just leave the dog on the road so she's transformed into the dog that they ran over. Another involved an urban legend with a woman wearing a mask. Another was about an umbrella that was actually someone's arm. Most of the stories were in a school setting and the mc's were usually girls.

If anyone could help me out, it would be much appreciated. Thank you!

i found the manga and didnt mean to post this so i want to delete it but i dont know how 🙁( someone please help me out