This is the sequel to the first season of Mashin Eiyuden Wataru. Wataru has been living happily on Earth after defeating Doakudar. While playing with his friend, Ryujinmaru appears and asks him to fight again. It turns out that the 7 Stars Mountain, the source of Mt. Soukai's rainbow, has been taken over by Doakadar (Doakudar's brother). If all the stars of the mountain lose their brightness, Mt. Soukai's rainbow will fade, and everyone will live in darkness for eternity. Once again, Wataru must go through all the 7 stars system to destroy this new, stronger enemy.