| Seiyuu | Role |
| Sakura Nogawa | Ray Kasugano |
| Jin Yamanoi | H Ring Man |
| Yuusaku Yara | Director Sawa |
| Ui Miyazaki | Red Ribbon |
| Hiroki Takahashi | Shinoyama |
| Youko Honna | Misato |
| Hitomi Nabatame | Rie |
| Akio Ohtsuka | Black Jack (Episode 1 & 13) |
| Mika Kanai | Honoka (Episode 12 & 13) |
| Tomoe Oumi | One (Episode 10 - 12) |
| Yui Horie | Sumire (Episode 7, 8, 11, 13) |
| Daisuke Namikawa | Kouichi (Episode 7, 8, 10 - 13) |
| Satomi Arai | Mami |
| Shiho Kawaragi | Rumi |
| Ryo Hirohashi | Miyabi (Episode 5) |
| Sachiko Kojima | Blue Socks (Episode 13) |
| Houko Kuwashima | Kanna Takekawa (Episode 2) |
| Saeko Chiba | Anna Takekawa (Episode 2) |
| Kenji Nojima | Takumi (Episode 9) |
| Masumi Asano | Saeko (Episode 9) |
| Takaya Hashi | Tetsuzou (Episode 9) |
| Hiroyuki Yoshino | Yuusuke (Episode 8) |
| Daisuke Kirii | Doctor Horibe (Episode 2, 6, 8) |
| Makoto Tsumura | Kouichi (as a child Episode 4 , 6, 7) |
| Tomoe Hanba | Sayaka (Episode 5) |
| Rie Tanaka | Kaori (Episode 8) |
| Yuka Inokuchi | Hana (Episode 8) |