The cherry blossoms are blooming, the sun is shining, and it's the perfect time to hit the pool! Haruka, Makoto, Nagisa, and Rei are anxious to get into the water and warm up their winter muscles ASAP, but things aren't all flip-turns and finish lines. Haru's passion for swimming is drying up, which dashes Rin's hope for a true rivalry. With their futures after high school looming over them, Makoto and Haru are having a hard time focusing. And a gruff new Samezuka student, Sosuke, appears.