Hikaru is a 17-years-old boy who is disliked by all his classmates because of his height and weight, he got bullied almost every day by bullies, he left school with bruises all over his body, he got used to everything that he sometimes didn't find it hard to endure everything his classmates put him through; one day on his way home he encountered a blue stone and it asked him to become partner's; will Hikaru's life be changed for the better or for worse?

A stone changed my life.