Reigning class gambling champion Mary attempts to hustle unsuspecting transfer student Yumeko Jabami into a high-stakes game of rock paper scissors.

Mary is relegated to the lowest levels of the gambling hierarchy after her loss; student board member Itsuki challenges Yumeko to a game of pairs.

To regain her status, Mary duels student board member Yuriko in a game of "life or death"; with Mary's crushing defeat, Yumeko offers to play next.

Yumeko and Mary square off against two others in a game of Indian poker after being given a chance to minimize their colossal gambling debts.

Kiwatari continues to lose as Yumeko and Mary bluff their way through the game, but the final outcome comes down to Tsubomi.

Yumeko must face Beautification Committee chair Midari in an ESP card game involving Russian roulette before playing the student board president.