Power Battle Watch Car

Kai's story: Kai is born at a high profiled family. He doesn't have a mother and is raised by the butler of the household. His father is cold and doesn't pay much affection to his son. Blood was the birthday present from his father. Kai wins the silver medal at his very first match, but his father is never satisfied as the winner was the son of his rival. It traumatizes Kai and he has a paranoia - he always has to be a winner, not a loser.