Hyunjin is a friend of your boyfriend (Han) you are very best friends, today you are at school and since Hyunjin doesn't know you yet Han decides to introduce you to Hyunjin at recess, then they ring the bell to go to recess. and Han lends you Hyunjin

Hyunjin: Hello, my name is Hyunjin and I am Han's best friend.

Hyunjin shakes your hand