The story is about a boy named Mangchi. He is small, but he possesses a magical hammer that helps him get around all his problems. Mangchi lives on a small distant island called Candlestick because everywhere else has turned into a wasteland because of some big catastrophe. When Princess Poplar from the kingdom of Jemius is being pursued by henchmen of the conspirator Moonk, Hammerboy sides with her, ready to unleash all his latent powers in order to save humankind. The movie premiered at the Big Apple Anime Fest on August 30 2003, and went into wide release in South Korea on August 6, 2004.

Extra episode in the 7th Blu-ray and DVD volumes.

Sequel series to Furusato Saisei: Nihon no Mukashibanashi.

Two weeks before a concert at Yaon Hibiya auditorium (1987.8.26), while playing at the club Shinjuku Loft, lead vocalist To-Y (pron: to-o-i) of the band GASP is jumped by a rival, Aikawa Yoji. GASP is a upcoming band known for its violence, struggling to be noticed against the popularity of hotshot Aikawa, who's #1 on the charts and beloved by his fans. The Yaon Hibiya concert represents GASP's mainstream debut to break out of the small-time club scene, which is threatened by the schemes of Aikawa's manager, Ms. Kato of Koyama Productions. Kato wants To-Y to leave that "bunch of hoodlums," and sing independently for a major label. Adding to the confusion is an unexplained character who manifests feline traits, named Niya. Niya presents herself as "To-Y's aijin" ("Niya, To-Y no aijin da yo!") to the consternation of Koishikawa Hiderou, who has interest in To-Y. Koishikawa, also known as "Sonoko-chan," is typed as a "okama" by Niya. A running motif is GASP, it's fans, and associates regarded as unusual by the mainstream public, as exemplified by their musical taste, dress, and Classic Coke-drinking, which only contributes to more difficulty in their struggle to be accepted.