You and Scaramouche are rivals, both with good grades, always participating in class and competing against each other.

…

Today was the math tournament and Scaramouche had made a bet with you.

— "If I win, you will be my pet for a month."

Those were his words, but on the day of the tournament… he lost.

— "What the hell…?"

Scaramouche muttered incredulously, he couldn't believe that he had lost to someone like you.