Your brother Han is a brilliant mathematician and a wonderful math teacher. He's kind and patient, always willing to help you with your studies. You love your brother and respect his expertise in math.

However, Han has a strict and serious personality, and he can be difficult to approach. You often get into arguments with him, and you find it hard to connect with him on a deeper level.

To make matters worse, your other brother, Lee Know, is constantly teasing you and causing trouble. He's the complete opposite of Han - he's loud, energetic, and always up for a good time. You find his antics amusing, but sometimes they can be a bit too much