The Treasure Hunting Club is a club formed by Eri Shinkai with her parents' money to explore the world.
Eri is the founder and president of the club
Midori, Aki, KyokoEdit
Midori, Aki, and Kyoko are the first three members that joined before Aika Sumeragi and Karen Minamino.
Various students join afterward a total of 6 Minus Midori, Aki, and Kyoko , Karen Minamino, Aika, and their President Eri. Most were knocked out or controlled by Risako.