Super Secret Number Card Investigation Club

The Number Club is a club form by Yuma Tsukumo's friends. In reference to its name, the club is form with the purpose of uncovering the mystery sorrounding the Number cards.

Members

 * Astral
 * Kotori Mizuki
 * Tetsuo Takeda
 * Tokunosuke Omoteura
 * Cathy
 * Takashi Todoroki