Section 5: Dungeon Dice Monsters arc, known as Section 5: D.D.D. arc (第（だい）五章（しょう）Ｄ（ディー）・Ｄ（ディー）・Ｄ（ディー）編（へん） Daigoshō Dī Dī Dī-hen) in the Japanese version, with "D.D.D." standing for "Dragons, Dice & Dungeons" (ドラゴン・ダイス・＆（アンド）ダンジョンズ Doragon Daisu ando Danjonzu), is a story arc in the Yu-Gi-Oh! manga. The new student, Ryuji Otogi faces Yugi Mutou in a game of Dungeon Dice Monsters, for the ownership of the Millennium Puzzle.