Erika Tosaka

Hayato, a boy in the 6th grade, hides the secret that he can't swim. Every summer, he pretends to be sick, so he could avoid school swimming tournaments. But, as it is the last year in the elementary school, he can't escape from swimming practice and is forced to participate.

Ai Kishimoto, Yukari Miyazawa and Akane Kishimoto are sisters. The sisters live apart in Kanazawa, Toyama and Tokyo, but they gather together to attend their grandmother's funeral. There, they learn about their mother whom they know as deceased. While seeking out the the truth about their mother, the sisters face their own problems, but take a courageous step forward.