By now Yamada is battling a desperate “war” against the seemingly invincible Kyouka Kanejō. Kyouka even manages to beat Yamada, the fastest swimmer in her class, in a 50-meter freestyle swimming race, even with Yamada trying to cheat. Yamada even tries to enlist the help of her sister Chika, but when she took her to meet Kyouka, she and Chika became fast friends, much to Yamada’s dismay. Meanwhile, summer break is coming, and Kosuda asks Yamada out to go somewhere for the summer break. Both see this as an opportunity, but there are hurdles. Part of those hurdles include a non-matching schedule between Yamada and Kosuda, resulting in the both of them not able to find a day reserved for themselves.