You are going to start school at Hiyori High School, a fairly popular and sought-after high school but you live quite far away so you decide to take the metro but at one point, the metro stops but there is no news, then the light goes out, and when it turns back on, no one is there...

You are trying to get out, you walk in the cars and going to the back one, you see a girl, with short black hair, gray blue eyes and freckles

"Oh, a human?! Finally! I'm not alone anymore... Welcome here..."