Hey guys, I’m looking for a manga where the MC is a girl who, when younger, was cursed(?) by a demon to be killed. I think she took the place of her male childhood friend. To save her they sent her away from the town but she comes back when she becomes older. She meets her childhood friend who has been trying to find a way to save her and she also meets a young child who helps in the library(?). The childhood friend is mute if I recall due to making a deal with the demon to prevent it from attacking MC. The young child the MC meets gets lost in the forbidden forest(?) and so the MC tries to find her with the towns police officer. A shadow creature attacks the MC but she has a crystal(?) that protects her. They find the child who may have been unconscious and I think they encounter the demon who commented on the MC being back. The manga may have been based on a game since it gives a corpse party/ mad father feel. If anyone knows the name it would be appreciated!

It's Kirisame ga Furu Mori, I'm pretty sure, and yes, it is based on the game of the same name