ONLY I KNOW GHOUL SAVED WORLD NOVEL SC VOL 01 #1

While on her first foray into the Labyrinth, amateur adventurer Alice finds herself surrounded by ferocious beastmen. All seems lost, but she's saved by a young man named Leon, who claims to be a monster himself. Alice believes there's more to him than that, however. She thinks Leon might be exactly what this ruined world needs: a hero.