Shori was afraid of water since he was a kid. It was a bad experience for him when he drowned in a swimming pool after his mom left him for a while. He has a crush towards his schoolmate but unfortunately she likes a guy who knows how to swim. Something had knocked him in his mind to start swimming.    

An ordinary girl that loves swimming. Swimming has been her favourite activities and worked as a part-time swimming tutor. She was the first person to listen to Shori's problem and helped him with everything that relates to swimming. She is the one who teach Shori as a private tutor and made Shori impressed with her skills and lessons. She attend a normal high school but not the same as Shori.