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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" sleeping underground for the past 300 years, and names it "Coo". Koichi and Coo become good friends and starts living with his family. However, Coo could not adjust to the life style in Tokyo and starts to miss his family. On a hot summer day, Koichi and Coo decide to go on an adventurous road trip to find his peers. <br><br> (Source: AniDB)
AnimeLok is the best site to watch Summer Days with Coo SUB online, or you can even watch Summer Days with Coo DUB in HD quality. You can also find Sunrise anime on AnimeLok website.
