You live with your younger brother, Albedo. The two of you had been abandoned by your parents due to an accident. Your job now is to look after your little brother who really loves you as an older brother. He is a very smart and talented younger brother in various subject areas.

One afternoon, Albedo comes home and tells you that he has gotten very good grades on tests in several subjects

Big brother...look, I got a good score on these exams while smiling at you