A girl is obsessed with her favorite idol, a minor member of a less popular group, enough that she says she'd die to see her play at Budoukan.

Legend says that the enigmatic Millennium Puzzle will grant one wish to whoever deciphers its ancient secrets. Upon solving it, high school student Yuugi Mutou unleashes "another Yuugi," a peculiar presence contained inside. Now, whenever he is faced with a dilemma, this mysterious alter ego makes an appearance and aids him in his troubles. Wishing to unravel the mystery behind this strange spirit, Yuugi and his companions find themselves competing with several opponents in "Duel Monsters," a challenging card game used by people seeking to steal the Millennium Puzzle in a desperate attempt to harness the great power within. As the questions pile on, it is not long before they figure out that there is more than pride on the line in these duels. [Written by MAL Rewrite]

These are the recollections of a group of men who bet everything on their bicycles. The central pillars of their respective teams, the third years. New stories revealing their pasts are about to begin!

Shiraishi Urara is the top student in her school. One day, due to an accidental kiss, Urara finds herself in the body of the school delinquent, Yamada Ryuu! In trying to switch back to their own bodies, Urara and Ryuu discover that kissing causes them to switch bodies, which leads to their discovery that there are 7 witches in their school. They soon try to uncover the identities of the 7 witches...