All Gun wanted to do was turn over a new leaf. A problem child since birth, Gun thought transferring to Northern Art High School and moving into the Lucky Residence would offer him a fresh start--a chance to begin again, away from his punch-drunk past.
He really should have known better. Whether it's having his attempts at romance with the lovely Seung-Ah thwarted time and time again by the lusty Ji-Ae, putting up with deliveryman Sung-Rae's dreams of heavy metal stardom, or dealing with Northern Art's gangs, Gun is going to have a very hard time shaking off his past. However, it's something he must do if he's to look towards the future, and Gun's future is a bright one indeed.
For on the hard asphalt surface of a bike track, Gun will finally lose his apathy and find himself. On the back of a motorcycle, Gun's life finally has purpose, and it's a purpose that will not be fulfilled, at least in Gun's eyes, until he's taken the checkered flag in the Korean Grand Prix.
(Source: MU)

Based loosely on norse mythology, Ragnar?k is the term for the "Twilight of the Gods" the final destruction of the world. Christian equivalence would be Final Judgment.

After 1000 years of peace, the wolf god Fenris Fenrir has been reborn. She seeks to find the reincarnation of Balder, the most beloved God, as the land of Midgard sinks further into anarchy. They are both key players in the coming of Ragnarok, the time when fate and free-will shall come into conflict as the very nature of the universe is forever redefined.

The story begins with the reborn wolf god Fenris Fenrir in the form of a warlock. She is searching for the main character Chaos, a swordsman suffering from amnesia and possessing skills of a Dragon Knight who happens to be the incarnation of her love, Baldur. The story follows the journey of Fenris, Chaos, Iris (a cleric who is Chaos' friend), and Loki (one of the top assassins in Midgard), who are pursued by the Valkyries, lead by the war goddess, Freya.