| Seiyuu | Role |
| Maaya Sakamoto | Haruhi Fujioka |
| Mamoru Miyano | Tamaki Suou |
| Masaya Matsukaze | Kyouya Ootori |
| Kenichi Suzumura | Hikaru Hitachiin |
| Ayaka Saitou | Mitsukuni Haninozuka |
| Yoshinori Fujita | Kaoru Hitachiin |
| Daisuke Kirii | Takashi Morinozuka |
| Kozue Yoshizumi | Renge Houshakuji |
| Daisuke Gouri | Mitsukuni's Father (Episode 18) |
| Fumihiko Tachiki | Kyouya's Father (Episode 17, 24 - 26) |
| Yuichi Nagashima | Misuzu Sonoda (Episode 15 & 16) |
| Kousuke Toriumi | Akira Komatsuzawa (Episode 14) |
| Tomoko Kawakami | Kuretake (Episode 11) |
| Wataru Hatano | Ritsu Kasanoda (Episode 22 & 23) |
| Daisuke Namikawa | Tetsuya Sendou (Episode 22 & 23) |
| Yutaka Nakano | Ritsu's Father (Episode 22) |
| Kikuko Inoue | Kyouya's Older Sister (Episode 24) |
| Kazuhiko Inoue | Tamaki's Father (Episode 25 & 26) |
| Hisako Kyouda | Tamaki's Grandmother (Episode 25 & 26) |
| Yukari Tamura | Eclaire (Episode 25 & 26) |
| Kurumi Mamiya | Kirimi Nekozawa (Episode 11 & 13) |
| Mika Doi | Ryouji's Wife (Episode 10, 13, 19) |
| Takehito Koyasu | Ryouji Fujioka (Episode 10, 13, 19, 26) |
| Michiko Neya | Ayanokouji (Episode 1 & 13) |
| Natsuko Kuwatani | Kanako Kasugasaki (Episode 2 & 13) |
| Hideki Tasaka | Tooru Suzushima (Episode 2) |
| Ikuya Sawaki | Renge's Father (Episode 4) |
| Yuuji Ueda | Umehito Nekozawa (Episode 5, 11, 13, 21) |
| Junko Takeuchi | Shirou Takaouji (Episode 6 & 13) |
| Mai Kadowaki | Hina Kamishiro (Episode 6) |
| Mitsuki Saiga | Benio Amakusa (Episode 9 & 19) |
| Miho Yamada | Chizuru Maihara (Episode 9 & 19) |
| Yuuko Sasamoto | Hinako Tsuwabuki (Episode 9 & 19) |
| Ryouko Ono | Honoka Kimiwado |
| Sayaka Narita | Kozue Kitamikado |
| Yuuko Sanpei | Shiori Ebisugawa |
| Kiyomi Asai | Kimiko Sakurazuka |
| Ayahi Takagaki | Tsubaki Kamigamo |