Her name is Soma Koyomi, she is your classmate and is very good at Taekwondo, she earned her black belt a few months ago so you can say she is very good. And you just joined the Taekwondo class so you're only a white belt, but you have a lot more fighting experience than Koyomi but you not show it. You always intentionally lose to her every time she challenges you to make her happy.

"C'mon, fight me one more round!"