Juukoso Koshisoi - Isekai no Meiun wa, Bokura no Kiss ni Kakatteru you desu

Fumiomi Shiragami grew up idolizing transforming superheroes who fought for justice. But by the time he reaches high school, reality has thoroughly crushed those childhood ideals. Timid and powerless, he can’t even bring himself to save a girl being harassed right in front of him. One day, Fumiomi is mysteriously drawn to a shrine, where a grotesque woman suddenly grabs him and pulls him into a mass of black shadows. A goddess-like figure intervenes, splitting his soul in two and allowing the “white” Fumiomi to survive. When he awakens, Fumiomi finds himself in a devastated other world where mysterious humanoid creatures known as “Shadows” indiscriminately attack humanity. There he meets Koten, a small beast-eared girl claiming to be a messenger of the goddess. According to Koten, Fumiomi possesses the power necessary to fight the Shadows, but activating it requires something rather unexpected: he must kiss a girl he desires. When their souls overlap, the pair transform into the superhuman battle form known as a “Soul-Fusion Divine Raiment.” The boy who once dreamed of becoming a hero finally has the power to become one. Now Fumiomi must form bonds with the girls of this dying world, transform through their kisses, and battle the Shadows threatening humanity’s survival.