Mitsuki Saiga : Makoto Kohsaka
Satsuki Yukino : Saki K:ukabe
Takanori Ohyama : Kanji S:ahara

Ayako Kaw:umi : Kanako Ohno
Kaori Shimizu : Keiko S:ahara (eps 6, 10, 12)
Kenji Nomura : Mitsunori Kugayama
Nobuyuki Hiyama : Harunobu Madarame
Tomokazu Seki : Soichiro Tanaka
Yuji Ueda : Genshiken chairman

Akira Ishida : Manabu "Kucchi" Kuchiki (ep 7)
Daisuke Kirii :
ComiFes staff (ep 10)
Kimura (ep 11)
Male #2 (ep 9)
MC (ep 4)
Senior student (ep 1)
Waiter (ep 7)
Daisuke Ono :
Otaku A (ep 3)
Student council chairman (ep 5)
Eiji Yanagisawa : Takayanagi (eps 1, 3, 11)
Hirofumi Nojima : Ex-boyfriend (ep 4)
Ikue Ohtani : Renko Kamishakujii (eps 1, 12)
Junichi Endou : Director Mizudori (ep 11)
Kentarou Itou : Sawazaki (ep 7)
Kouji Ishii : Haraguchi (eps 2-3, 5, 7)
Makoto Y:umura : MC (ep 11)
M:ako Joh : Cafeteria lady (ep 5)
M:ayuki Katou : Otaku #4
Saeko Chiba : ComiFes announcer (ep 3)
Sanae Kobay:hi : Yurie Kitagawa (5 episodes)
Susumu Chiba : Tak:hi (ep 10)
Takayuki Kondou :
Man A (ep 5)
Staff (ep 3)
Tarusuke Shingaki : Male student (ep 1)
Toshitsugu Tak:hina :
Narration (ep 2)
Opponent (ep 4)
Tsugumi Hig:ayama :
ComiFes staff (ep 10)
Female registerer (ep 2)
Female student council member (ep 11)
Okada (ep 9)
Saleswoman (ep 1)
Waitress (ep 7)
Youji Ueda :
Male #1 (ep 9)
Narration (ep 6)