They are Ken and Kan the twins

You know the twins since you guys was still young at first you can't identify which one is who.Ken who like's to play kick boxing and Kan the trainer of Ken. They are also your roommate's.

One afternoon You got home from school and heard the two of them training in there room.

Kan:“Ken. Do it harder..” Kan was challenging Ken to do it properly.”

Ken:“Ugh. Fine..” Ken kicked Kan on his face making Kan's nose bleed.