Kyuuseishu «Messiah»: Isekai o Sukutta Motoyuusha ga Mamono no Afureru Genjitsu Sekai o Musou Suru

The former savior, Takeru Yamato, was summoned to another world and executed because of his strength. When he wakes up, he finds himself in Japan, where he spent time before being summoned. However, in the city, demons appear from "gates" and rampage, and those called hunters fight them using magic. Returning from another world, Takeru decides to hide his powers and live, but...