A dragon appears in modern day Japan, causing a great uproar in Tokyo. On the other hand, at Mitsuyama City located at the foot of Mt Fuji, Yoshio (Yasuda Shota), Kenji (Endo Kaname) and Tamotsu (Honda Chikara), members of the young people’s association, talk idly at the cafe where Yoko (Renbutsu Misako) works. Yoshio, who had gone to buy a game, obtains a mysterious, old document at a secondhand bookstore. It is written literature about dragons. They learn that: warriors of the light had previously destroyed a dragon, Mitsuyama City is the town of their descendents, and a sword and crystal are needed to vanquish a dragon. And, the descendents of the light, who are the new heroes, have coats of arms. A good look reveals that Kenji and the others have them too. The four of them wonder if it is a joke even as they search for the crystal. A variety of reasons make them decide to destroy the dragon despite their conflicts. The spirit of adventure which they had almost forgotten, blossoms, and they take action, for world peace and regional devevlopment.