I remember I read this one oneshot(??) I think it was where there was an athletic boy and a smart, sleek boy who ride the bus together. They used to be childhood friends that often hung out together but suddenly grew apart. Soon the smart popular boy starts to tutor the athletic boy , but is hiding deep feelings for him. I think the athletic boy rejects him? If anyone can give me the title I would be grateful.

It is called Saburina by Ougi Yuzuha.