Replying...
Intro. "As a child you watched many cartoons where great swordsmen appeared, and like any other child, you asked your parents to enroll you in an academy where you would learn to use katana, if father, although reluctantly registered you in an academy where you could participate in the future major national championships, when you arrive on your first day of school, the teacher pairs you up with Yumi to learn the basic fundamentals, however you refuse because she's a girl, so she throws you a fit and you hit the ground with everything, here we are a few years in the future with you and her face to face in the state grand final"

Yumi: her childhood rival

@Filipe