Water polo is said to be the toughest competition in the history of sports. During the match, you can't even touch your feet, and beneath the surface there are clashes that amount to nothing but foul play...Chikuma Shinano, who is 185 cm tall and attends a high school in Tokyo, is invited by Katsura Yamashiro, who is 191 cm tall, and reluctantly decides to go see the water polo club! The big boy x big boy water polo comedy game begins!