| Seiyuu | Role |
| Yukari Tamura | Misha |
| Miyuki Sawashiro | Kotarou Higuchi |
| Yukana Nogami | Shia |
| Motoko Kumai | Hiroshi Mitarai (Dai-chan) |
| Mitsuki Saiga | Takashi Ayanokouji (Ten-chan) |
| Rie Kugimiya | Koboshi Uematsu |
| Yumi Touma | Nyaa |
| Sakura Nogawa | Kaoru Mitarai |
| Masaaki Tsukada | Kaoru & Hiroshi's Butler |
| Ai Tokunaga | Miku (Episode 24) |
| Hikaru Tokita | Tomoyuki (Episode 24) |
| Nobuyuki Hiyama | Kotarou's Father |
| Isshin Chiba | Kotarou's Homeroom Teacher |
| Akemi Okamura | Sasha |
| Taeko Kawata | Shino (Kotarou's Cousin) |
| Asami Imai | Narration (Episode 21) |
| Asami Imai | Ken (Episode 24) |
| Akira Tomisaka | Sadami (Episode 24) |