Eikyuu Fumetsu Devil Point

A boy named Nanjou Fusato, who sees himself as unremarkable and without friends or romantic prospects, discovers a book at a strange shop and attempts a demon-summoning ritual. The ritual partially succeeds, resulting in the appearance of a devil named Selphie, who acts as both a companion and a wish-granting entity. However, her ability to fulfill wishes is limited by a system of "devil points" that Fusato must accumulate. If his points run out, he will die. The story centers on his struggle to navigate this dangerous arrangement and avoid a fatal outcome.