When the warden, Benga, refuses to assign Kokuri to Boruto's and Mitsuki's cell, they try to find out Benga's weaknesses to exploit him. A prisoner named Doragu is willing to provide them with information, but they must first pass a test.

Cast: Yûko Sanpei, Kokoro Kikuchi, Ryûichi Kijima, Akio Nojima, Takayasu Usui, Masanori Takeda, Tsuyoshi Koyama, Ryouta Suzuki, Riki Kitazawa, Dai Matsumoto, Naoyuki Shimozuru, Makoto Ishii, Daiki Kajimoto, Kazuya Saji, Katsunori Okai