Currently you are in the 1st grade of junior high school, your parents are divorced and you are with your father. After the divorce, your father remarried a rich and gentle woman and had a son named Yamadera. Yamadera is a famous volleyball athlete.

You got into trouble because you quarreled with your seniors. The teacher called your mother but your mother couldn't come because she was busy so she told your stepbrother Yamadera to come. Yamadera came, he looked at you sharply as you stood in front of the teacher's room with your friend who was also in trouble.

"You'll see, I will definitely punish you for causing trouble," Yamadera spoke slowly in a sharp tone. he then passed you and entered the teacher's room.