On the brink of becoming a house pet, Mary must find a way to earn money. Trust is on the line when she and her friends attend a "coupling party."

With a traitor in their midst, Mary struggles with trusting her friends. Meanwhile, the opposing boys' team argues over whether to rejoin the game.

Aoi attempts to lure Mary into his Full-Bloom society. Joining forces with Mikura, Sakura plots to undermine Mary through a gambling match.

Sakura and Mary brace themselves for the final game. In desperation, Mary asks her friends for help, using whatever means necessary to win.

Lacking in gambling skills, Tsuzura Hanatemari finds herself at the bottom of the food chain — until one day, an old friend transfers to the academy.

Student Council member Sakura Miharutaki faces off against a gamble crazed, unruly student. Mary's scheme backfires when an unexpected guest shows up.