Lucifer Dark the summoned fallen angel

Lucifer Dark is a kid who everybody stays away from.One day he and his class are summoned to another world to defeat the demon lord.Everybody got cheats exept our Lucifer.But the king let him join the heroes anyway because he could fight.On one mission he was betrayed and left half-dead. He sweared he will get his revenge no matter what. This fiction includes:foul language,gore and sex. This is my first time writing and english isn't my first language.