| Seiyuu | Role |
| Hidenobu Kiuchi | Hei |
| Misato Fukuen | Yin |
| Ikuya Sawaki | Mao |
| Nana Mizuki | Misaki Kirihara |
| Tomoyuki Shimura | Yousuke Saitou |
| Kousuke Toriumi | Yutaka Kouno |
| Takeshi Kusao | Wei (Episode 9 & 10) |
| Emi Motoi | Etsuko Ichikawa (Episode 7 & 8) |
| Fumie Mizusawa | Rika Ou (Episode 7 & 8) |
| Nozomu Sasaki | Norio Ukiyama (Episode 7 & 8) |
| Naoko Matsui | Arisa Yumizuki (Episode 7 & 8) |
| Emiri Katou | Kiko Kayanuma (Episode 7, 8, 13, 14) |
| Katsuhisa Houki | Naoyasu Kirihara (Episode 9 & 10) |
| Shigeru Nakahara | Nick Hillman (Episode 11 & 12) |
| Sayaka Ohara | Mina (Episode 11 & 12) |
| Hideyuki Tanaka | Sergei (Episode 11 & 12) |
| Daisuke Kirii | Reiji Kikuchi (Episode 11 & 12) |
| Ai Satou | Berta (Episode 13 & 14) |
| Norihiro Inoue | Ehris (Episode 13 & 14) |
| Yoshino Takamori | Annis (Episode 13 & 14) |
| Yasunori Matsumoto | Gai Kurasawa (Episode 7, 8, 13, 14) |
| Shizuka Itou | Alice (Episode 9 & 10) |
| Megumi Toyoguchi | Chiaki Shinoda (Episode 1 & 2) |
| Wataru Hatano | Jean (Episode 1 & 2) |
| Chika Sakamoto | Misuzu Ooyama (Episode 1, 3, 12) |
| Michihiro Ikemizu | Yoshimitsu Hourai (Episode 1, 4, 5) |
| Megumi Nasu | Mai Kashiwagi (Episode 3 & 4) |
| Kouji Ishii | Kenneth (Episode 3 & 4) |
| Jin Yamanoi | Luco (Episode 3 & 4) |
| Sanae Kobayashi | Kanami Ishizaki (Episode 4, 9, 10, 13) |
| Yuuna Inamura | Mayu Ootsuka (Episode 1 - 6) |
| Shinichirou Miki | Eric Nishijima (Episode 5 & 12) |
| Naomi Shindou | Havoc (Episode 5 & 6) |
| Kazuhiko Inoue | November 11 (Episode 5 & 6) |
| Miyu Irino | Young Hei (Episode 12) |
| Takako Honda | April (Episode 5) |
| Yasuyuki Kase | Rui / Sho (Episode 1) |
| Junichi Sugawara | Yuka's Father (Episode 4) |
| Fumie Mizusawa | Yuka (Episode 3 & 4) |
| Fumie Mizusawa | Erica (Episode 1) |
| Kiyomi Asai | July (Episode 5) |
| Erino Hazuki | Mayuko (Episode 13) |