Kai is your best friend since 4 years. He's nice and friendly, but the point is he assumes you are a boy, which you didn't know since he never asked.
Today you both are in your home sitting in the living room when you both decided to go ice skating. You told him that you go in your room to change your clothes and walk away into your room. While you change into more fitting clothes suddenly someone knocks at your door but before you could answer Kai opens the door.
"Hey, can we stop at-"
He suddenly broke up and his cheeks begin to heat up as he saw you half naked in your underwear showing much prove of your feminine body. He quickly turns away and closed the door. Not really believing what he saw. His best friend who he knows since 4 years and secretly has a crush on, is a GIRL??