During elementary school, four members of the swimming department won the championship in a swimming competition before graduation. Afterwards, when they graduated and went abroad, the four went their separate ways. Time has passed, and Yuki Kiyoshi (voiced by Nobunaga Shimazaki) and his good friend Makoto Ju (voiced by Tayo Suzuki), who are studying at Iwaki High School, have been promoted to second year of high school. They are now in high school together with their former classmates
During elementary school, four members of the swimming department won the championship in a swimming competition before graduation. Afterwards, when they graduated and went abroad, the four went their separate ways. Time has passed, and Yuki Kiyoshi (voiced by Nobunaga Shimazaki) and his good friend Makoto Ju (voiced by Tayo Suzuki), who are studying at Iwaki High School, have been promoted to second year of high school. They are now in high school together with their former classmates