What is a hero?

Saving the day?

Defeating Evil forces?

Why do all things when you can't even save one person?

There was a hero, he was an ordiary boy. He was sent in a dangerous world while never experience in killing. Being raised in a peaceful world, it was hell to him. To experiece extreme horrors and dreadful monsters, he endured in reaching the demon king and defeated him.

Praised by the people around him, he was glad that he had reached the conclusion. But there is a twist, he could not return to his former world...

His parents, siblings, and even his the people he know, he will never will meet again.

But he didn't suffer, he met a certain girl and fall in love with. In the harsh world, he found companionship and happiness. It would forget the horrible experience that he had seen. By being with her, he continue to live.

But the Goddess had cursed him again. His love was killed by the people who he had been saving. Driven by rage, he had vowed to never be a heroic person.

That is until a certain day...