Mattsu and Yamma are two boys who live in Matsuyama. Their favourite pastime is looking for "the seven wonders of Matsuyama". One day, two men appear. What are the 7 hidden gems that they seek? Moburi, a high school girl who is like an older sister to the boys, also gets caught up in the adventure as this thriling story set in Matsuyama begins. Faced with all kinds of trouble, what will they choose for the future of their city?

Even though the Decepticons have been driven off Earth, a small team of Autobot Pretenders have remained behind, just in case. Led by Metalhawk ("Hawk" in his human identity), the Pretenders live among the humans, using their Pretender shells to assume human size and appearance. The Autobots' caution is rewarded: Decepticon Pretenders soon appear, led by a mysterious force called Devil Z. The Autobots and Decepticons soon build up their forces, recruiting humans to become Junior Headmasters and Godmasters (Powermasters).

At his father's command, Oguna, the youngest prince of Yamato, sets out to kill Takeru Kawakami, the leader of Kumaso. However, upon arriving in Kumaso territory, he is injured by the stray arrow of a young local woman named Kajika who is hunting game. Eager to compensate for the terrible mistake, she escorts Oguna to her village to treat his wound. But as the two rapidly fall in love, the prince makes a disturbing discovery: Kajika is Takeru's younger sister! Conflicted between his newfound love and family duty, Oguna seeks advice from the Phoenix, a legendary immortal bird that serves as Kumaso's guardian. Compelled to make a decision, will the Yamato prince betray his own for the woman he loves, or will he murder Kajika's brother as commissioned? Inspired by the Yamato Takeru Japanese legend, Hi no Tori: Yamato-hen chronicles the tragic story of an ill-fated couple, showing how true love can conquer hate and adversity even among the greatest of uncertainties.

Based on the first Wizardry game "The Proving Grounds of the Mad Overlord", a group of characters enter a dungeon to confront the ultimate wizard to prevent him from reaching an unstoppable power. On their way they meet up with a few new friends who have their own battles to settle, but their paths lay together.