|Shinnosuke as he appears in Twin Succubus, via affected archive footage, for Dr. Sugimoto's Lecherous Treatment.|
|Occupation||Assistant to Chairman Ohara [in Twin Succubus]
|Latest Appearance||Sugimoto Gynecology Clinic ~Nurse Correction Program~|
Shinnosuke Nakata was the main male character of SENPAI and Dr. Sugimoto's Lecherous Treatment. He also had a main appearance in Twin Succubus, alongside Chairman Ohara and Hosokawa, and another main appearance in Work in Progress alongside several other male characters.
Shinnosuke's facial features are similar to Takashi Togo's, though not as sharp or aggressive. He has black hair and a well-toned body. In Dr. Sugimoto's Lecherous Treatment, a sigil appears on his chest when Mimi Minami takes control of him.
Not much is shown of Shinnosuke's personality. In Twin Succubus, he is shown to be severely uncomfortable with what Ohara and Hosokawa are involved in, though he does not reject the opportunity to have sex with one of the girls brought to them. His personality, and indeed his entire identity, is seemingly erased before Dr. Sugimoto's Lecherous Treatment, where he is apparently under Mimi's control the entire time. Work in Progress shows that Shinnosuke has apparently lost the hesitation he previously had regarding non-consensual sex, repeatedly assaulting and raping Hana Ono.
Shinnosuke is the titular senpai in SENPAI. Ayane Tendo approaches him and asks if he is willing to join her and Manami Kinoshita in a threesome, to which he complies. When they are done, the two of them walk off to have sex with someone else, leaving Shinnosuke slightly confused.
in Twin Succubus
Shinnosuke is the primary point-of-view character for Twin Succubus. In the game, he is the assistant and understudy to Chairman Ohara, and bears witness to the heinous acts they commit on a nightly basis. When Kamira and Kurusu Kotara are brought to them by Chokugen and Mimi, Ohara allows him to pick one of them to have sex with. Ohara and Hosokawa then simultaneously have sex with this other girl. When the player's choice finishes with Shinnosuke, the other girl comes over and has sex with him. Kamira and Kurusu are then revealed to be succubi, draining the life forces of Shinnosuke, Ohara, and Hosokawa. As Shinnosuke realized this, he passes out from exhaustion, only to be woken up by the twins later, their human disguises discarded. They then proceed to have sex with him again, presumably killing him by draining his essence completely.
in Dr. Sugimoto's Lecherous Treatment
Shinnosuke is the male character in Dr. Sugimoto's Lecherous Treatment, though this is hidden for most of the game. Shinnosuke is brought to Shoko Sugimoto by Miyuki Kageyama, complaining of a headache, which Shoko proceeds to heal through sex. Towards the end of the game, when Sugimoto is tired out, a sigil appears on Shinnosuke's chest, and his penis splits vertically into two, which he then uses to rape Shoko vaginally and anally at the same time. He continues to do so until he climaxes, leaving Shoko completely incapacitated. The camera pans up to his face, revealing Shinnosuke's identity, and he then crumbles into dust. Outside of the room, Mimi leaves, her job done.
in Work in Progress
Shinnosuke is the initial main male character in Work in Progress, taking place some time before his death in Twin Succubus. When the game begins, he enters the bathroom that Hana is working in, despite the sign on the door. He then sexually assaults her at the urinals, eventually having sex with her. When he is done, Togo, Daichi, and Gario pop out of the bathroom stalls in the bathroom, and Togo knocks Shinnosuke into a urinal while Daichi and Gario take Hana away, knocking him out. He awakes later to see that Hana has become completely depraved, and he has sex with her again at her invitation.
in Sugimoto Gynecology Clinic
Shinnosuke has a brief cameo on the final page of Sugimoto Gynecology Clinic, being directed into the clinic's semen collection room by Chiha Rokuhato.
- Shinnosuke is the only recurring character to not appear in the OMEGA duology; he instead appears in the other two parts of the saga.
- Shinnosuke is the first character to be shown through archive footage, though he is also shown in original animations in Dr. Sugimoto's Lecherous Treatment.