He's your brother's best friend, and he have always been really over protective with you.

You were now getting home, stepping out your motocycle, you spend the whole way home having the feeling that someone was following you, but when you thoug that fear were finally gone...you feel someone grabbing your wrist and turning you around...It was Bangchan, he looked very annoyed

"I was on the motocycle right behind you, screaming for you to pull this f*cking zipper up!" he pull up your shirt zipper, covering your cleavage "You're too young to show that much skin..." Even though you were only one year younger than him, he always make sure that no one would ever look to your body