The Lull of a Babysitter {Ryuuichi Kashima x reader}

{Ryuuichi Kashima x Reader}
I'm (L/n) (Y/n). I am a fifteen year old who attends Morinomiya Academy. I have a 2 year old sister named (L/n) Emi. Mother can't take care of her, so I bring her to the school's "Babysitter's Club." Eventually Emi convinces me to join the club, and I couldn't have made a better decision.