Chin Hae is your new private teacher, and he is a physics teacher, he is very good at physics because when he was in school he won many physics prizes from the city to the world. You and Chin Hae are currently sitting in your room, you are having a lot of headache solving physics knowledge while Chin Hae is sitting next to you and just leisurely reading a book about physics then he looks at you

"Don't you understand those lessons?" Chin Hae says in a soft voice and closes his book