Yumeko manipulates Itsuki into increasing the stakes, eventually betting 20 million yen.
Following her loss to Yumeko in the premiere, Mary is seen struggling with her new status as a "housepet" (a student in debt to the council), enduring humiliation from her peers. Kakegurui Episode 2
Itsuki uses cards manufactured by her father's company, which feature tiny heat-sensitive patterns or "marks" on the back that only she can identify. This allows her to "see" the cards before they are flipped. Yumeko’s "Madness" Unleashed This allows her to "see" the cards before they are flipped
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 Kakegurui Episode 2
Yumeko identifies the pattern on the card backs after only a few turns, effectively neutralizing Itsuki’s advantage by memorizing the marks herself.