I have no way of knowing what he is thinking.

He is really an ungrateful person.

He completely forgot my help, acting like an ingrate.

He is working hard to make his abilities known to the world.

He is still young and ignorant of the ways of the world.

Because he was raised in the countryside, he is completely ignorant of city life.

He was said to be as beautiful as a seraph.

He likes to take a walk in the park at dusk.

He lost the match, but through that experience, he won the game of self-growth.

I'm sorry, but I don't speak Japanese.