[Comprehensive British and American] Mercenaries? Superhero?

Mogu is a mercenary, really. He is a new generation of peace who was born in a peaceful country and in a peaceful era, really. He is trapped in a waste city with only monsters and him, and the only way to escape is to pass the levels. When the survival time is up, if you suffer a fatal blow, you will return to the city and increase the refresh time of the level. Real. He meets a superhero, really. He fell in love with the superhero, really? Fake? Intention: Redemption and being redeemed, who saves whom?