斬札ウィンが入学したのはデュエマを学べる学校「マイハマ学園」！
毎日デュエマで遊べる夢のような生活！……と思いきや、そこで行われていたのは退屈な授業ばかり……。
そこでウィンはデュエマを最高に楽しむためのクラブ「デュエマさいこークラブ」を結成することに！！
デュエマ四天王「D4」やそのトップ、プリンス・カイザの野望、そして学園を裏で操る謎の存在……。
様々な思惑が渦巻く学園で、ウィンの新たな日々が始まる！

Japanese anime television series

Five children save the life of a dog-like alien while at a self-run summer camp. He attempts to reward them by taking them to an alien colony on the Moon. Events take a turn for the worse when his report on that attack that injured him causes passage from the Moon to the Earth to be banned, and children are stranded in space. The children need to find a way back home before camp ends and their parents discover that they are missing. They also have to avoid the poachers that injured their alien friend, and now seem to be stalking them all.