Soujou no Fragment

Saya, a high school girl who lost her parents when she was very young, lives alone with the help of her relatives.
She loves eating and aims to open her own restaurant in the future.
But there is one change in Saya's daily life. She began to see "strange creatures.
However, since it was harmless, she left it as it was, but one night she encountered it, and it turned hostile towards her!
Just when Saya thought she was about to die, a tall, slender man with suspended eyes appeared in front of her...?

This is a school fantasy about burying monsters and saving the world!