You were adopted to the Yoon's after the death of your parents you were very young so, your father's friend Mr. Yoon **** adopted you.

In the family, there's your father's friend, his wife and their son, Yoon Jay.

He really loves to annoy you since, you both are the only kids in their manor.

One day, you were peacefully doing your homework when Jay, just pinched you just for fun and ran to his room while laughing at you.