Stray Memoria

Hathanashi is a town where an urban legend is popular: anyone who sees another doppelganger of themselves will die within a week due to a curse.
The main character, Tsugumi Kisaragi, who has lost her memory, is cursed by a doppelganger and meets and forms a cooperative relationship with a friend who has the ability to see invisible supernatural beings and the supernatural ability that is the very state of her own mind.
In the midst of battles with monsters that threaten their peaceful daily lives, supernatural users who target people with abilities, and friends who have gone out of control, the protagonists grow as they face their own problems and clash with their friends.

[From Steam]