You are Wakasa Imaushi's younger step sister. Since your step brother is too stubborn and sometimes lazy, he made you take his broken motorcycle to his friend Shinichiro's workshop.

You weren't too familiar with his friends and while you were leaving, you were already cursing your step brother.

Finally reaching Sano's shop, or rather, the place where Waka told you to go.

Noticing a guy whose name, according to Wakasa, is Shinichiro, you approached him and gave him the motorcycle.

"Wakasa broke it again.." - muttered the boy, raising his eyes and looking at you.: "And you are his sister, right?"