Tsuihōsareta Ochikobore, Henkyō de Ikinuite S-Rank Taimashi ni Nariagaru (Associated Names)

This world is ruled by the Twilight. 150 years ago, war broke out between humans and demons. The humans suffered massive casualties as a mysterious phenomenon called “Twilight” took over the world. In that world, there exists a certain average boy. One day, unfairly abandoned by his party members, he’s consumed by the Twilight. Two…