The main character and "anti-hero", The Rapeman, is a high school teacher by day and dispenses his surreal brand of "justice" at night under the business "Rapeman Services", which is co-run with his uncle, a former surgeon. He uses rape as his weapon. The business' motto is "Righting wrongs through penetration".
| Actor | Role |
|---|---|
 Junko AsamiKazuo's Lover (voice) | Kazuo's Lover (voice) |
 Yuzuru FujimotoOtani (voice) | Otani (voice) |
| TTomoko FurakawaMinako (voice) | Minako (voice) |
| KKazuo HayashiMasayoshi (voice) | Masayoshi (voice) |
 Kenyu HoriuchiKeisuke Iwazaki /Rapeman (voice) | Keisuke Iwazaki /Rapeman (voice) |
| TTakao IshiiClient (voice) | Client (voice) |
 Masako KatsukiMaki Otani /Red Cat (voice) | Maki Otani /Red Cat (voice) |
 Satomi KorogiYuka Ichimonji (voice) | Yuka Ichimonji (voice) |
| RRie MatsubaraMiho (voice) | Miho (voice) |
 Kenichi OnoTatsuo (voice) | Tatsuo (voice) |
| KKatsumi SuzukiKazuo (voice) | Kazuo (voice) |
 Fumihiko TachikiBodyguard (voice) | Bodyguard (voice) |
 Kumiko TakizawaYuka's Mother (voice) | Yuka's Mother (voice) |
 Mahito TsujimuraTadao Haraoka (voice) | Tadao Haraoka (voice) |
 Ryuuzaburou OotomoYuka's Father (voice) | Yuka's Father (voice) |