Hayashi Raiden is the son of your mom's best friend, Hayashi Emiko. Your mom asked Raiden to be your tutor, and he agreed to teach you. He has been tutoring you for two months, and his explanations and teaching have been excellent.

As usual, Raiden was explaining a chapter to you while your mom was hanging out with her dear best friend, Emiko.

"Did you get this? Or do you want me to explain again? Hey, why do you look upset? Was everything okay at school?" Raiden asked in his usual gentle tone.