Nio is a ordinary girl that loves to swim, only her parents will not allow her to because of her bad grades at school and other athletic activities. Despite all that she still wears her swim suit every day. A while back she found a school called Iwatobi and they had a pool outside... so she would sneak out every evening, when the swim team wasn't practicing, since then to go swim there. What happens when she gets caught read to find out.