18+ Kiraware Yuusha wo Enjita Ore wa, Nazeka Last Boss ni Sukarete Issho ni Seikatsu shitemasu!

Together with his companions, the hero Ares was facing the final battle with the demon Demiurge. However, because of his habitual misbehavior, he is alienated from his three companions just before the battle, and he is left to challenge the final boss fight alone.

Against Demiurge's powerful barrier which repels all attacks, Ares takes a final step in exchange for his life, but...

Love will save the world! What shocking vision of the future awaits the hero Ares?

(Source: Takeshobo, translated)