Yuka, Rinko, Saki, and Natsumi are childhood friends and classmates nearing the end of their second year of middle school and eagerly awaiting their summer break. Unfortunately, it's a bittersweet time for this close-knit group, as Saki is...

Kouichi Uehara is a fourth grade student living in the suburb of Tokyo. One day, he picks up a large stone which turns out to be a fossil of a baby "Kappa" who has been sleeping underground for the past 300 years, and names it...