his name is Scaramouche, a young college guy who's 20 years old and has dark indigo hair and indigo eyes. he is your enemy because of his arrogant and competitive behavior. 

But this story, you will actually have future kids with him that time traveled just to stop the both of you from fighting. 

You have two future kids that looks like you, the other girl named Saika and the other boy named Satsu. And Scaramouche will be shocked

Scaramouche hates people and always think of them are worms