Katarina (カタリナ): Back to Wonderland

Rei Takabashi, or Zero, is a 14 year old guy who one day finds himself in a place so magical, its beyond everyone's wildest imagination: He finds himself in Katarina Wonderland, a reality based world in a VRMMORPG (Virtual Reality Massive Multiplayer Online Role Playing Game) that bends the reality itself, with Fire-breathers, Dragons, Medieval Warriors and so on. However, once you enter the game, you cannot exit until the game is beaten. There the main rule is simple: To participate or to die. The Wonderland will test Zero's skills in practically everything, from sword fighting to cooking to survival. But has he got what it takes to challenge the game masters and free everyone from the clutches of Virtual Reality?