Gokuu Son is a young boy who lives in the woods all alone—that is, until a girl named Bulma runs into him in her search for a set of magical objects called the Dragon Balls. Since the artifacts are said to grant one wish to whoever collects all seven, Bulma hopes to gather them and wish for a perfect boyfriend. Gokuu happens to be in possession of a dragon ball, but unfortunately for Bulma, he refuses to part ways with it, so she makes him a deal: he can tag along on her journey if he lets her borrow the dragon ball's power. With that, the two set off on the journey of a lifetime. They don't go on the journey alone. On the way, they meet the old Muten-Roshi and wannabe disciple Kuririn, with whom Gokuu trains to become a stronger martial artist for the upcoming World Martial Arts Tournament. However, it's not all fun and games; the ability to make any wish come true is a powerful one, and there are others who would do much worse than just wishing for a boyfriend. To stop those who would try to abuse the legendary power, they train to become stronger fighters, using their newfound strength to help the people around them along the way.

Dragon Quest is loosely based on Dragon Quest III. The names and some of the characters are familar, but the world map is smaller and a very different shape. The two main characters are Abel and Tialah. Tialah receives the legendary Red Stone from the Aliahan Village sage Master Yogi. Soon after, Tialah is kidnapped by the evil Baramos who wants to use the Red Stone to resurrect The Great Dragon and be granted eternal life. Abel swore to rescue Tialah and he is given the Blue Stone, which can only seal the Dragon once it has been released. (Source: AniDB)

Although peace has finally returned to Ikebukuro, many of the odd occurrences have become common sights around the city. One such case is the police's constant pursuit of Celty Sturluson, the Headless Rider. Moreover, someone has placed a large bounty on her, igniting the motivation of gang members all over to begin searching for the supernatural creature as well. Meanwhile, Mikado Ryuugamine is approached by Aoba Kuronuma, a mysterious underclassman with unknown intentions, who reveals that he knows Mikado's true identity. But Ikebukuro's state of tranquility is short-lived, as a new threat appears in the form of a murderer who goes by the pseudonym Hollywood, known for wearing a different mask each time they commit a crime. As the various events taking place prove to be connected yet again, Ikebukuro is thrown into another conflict that threatens to engulf the entire city in chaos.

Second part of Dungeon ni Deai wo Motomeru no wa Machigatteiru Darou ka IV.