In Episode 2 of Kakegurui , titled , the focus shifts from Yumeko Jabami's introductory victory to her first confrontation with a member of the elite Student Council, Itsuki Sumeragi . The Duel: Double Memory
The episode centers on a high-stakes game of a complex variation of the classic card game "Concentration." Unlike the standard version, this game uses two decks of cards, totaling 104 cards, making the odds of finding pairs significantly harder.
Yumeko systematically dismantles Itsuki’s confidence, winning the match decisively. The defeat is so absolute that Itsuki is reduced to tears, her status within the school shattered. The Fallout and Rising Stakes
Itsuki Sumeragi , a first-year student and daughter of a wealthy toy manufacturer, challenges Yumeko . Itsuki is known for her extreme obsession—collecting the fingernails and toenails of those she defeats in gambling.
Yumeko manipulates Itsuki into increasing the stakes, eventually betting 20 million yen.
The episode reinforces the central theme of the Kakegurui series: Hyakkaou Private Academy is a hierarchy built entirely on gambling prowess.