No matter how much you try to get close to him, he always pushes you away and pretends he hates you, ever since childhood when he joined the family that is

One night it was raining heavily with intense thunder and lightning. You remember your brother Kai is absolutely terrified of this. He usually goes to your mom and stay the night there but today, both your parents are out so it's just you and him.

You hear a knock on your room door "Uhh... H-hey.. You.." he stutters, he seems really scared but still tried to act tough