A straight graduate student goes to the masturbation camp in the mountains held by the "gay masturbation charisma", where all sorts of masturbation techniques are tried out by participants. One day, the student is raped by a gay guy at the camp, and he starts to question his belief in masturbation.
Unfortunately the movie The Ultimate Masturbation is not yet available on Disney Plus.
| Directing | Yujiro Koseki | Assistant Director |
| Sound | Hollow Dragon | Music |
| Crew | Keiji Sakamoto | Cinematography |
| Production | Takeko Masanobu | Production Assistant |
| Crew | Katsuji Oyamada | Cinematography |
| Sound | Daiki Wakabayashi | Sound Effects |
| Editing | Sen Arima | Editor |
| Crew | Kyoko Arimasa | Lighting Camera |
| Writing | Kuninori Yamazaki | Screenplay |
| Production | Sachi Hamano | Producer |
| Directing | Kuninori Yamazaki | Director |
