Kurumi Mori has, for her entire life, been able to see 'Echoes'- The ghosts of people who once existed in another timeline. Despite her parents' disapproval, she uses this ability to help those lost souls move on and stop lingering in the memories of the world. But everything in Kurumi's life will change when she meets a hostile Echo for the first time, forcing certain things to become undeniable.

[From itch.io]