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 | Kuninori Yamazaki | Director |
| Writing | Kuninori Yamazaki | Screenplay |
| Crew | Katsuji Oyamada | Cinematography |
| Editing | Sen Arima | Editor |
| Directing | Yujiro Koseki | Assistant Director |
| Sound | Hollow Dragon | Music |
| Sound | Daiki Wakabayashi | Sound Effects |
| Crew | Keiji Sakamoto | Cinematography |
| Crew | Kyoko Arimasa | Lighting Camera |
| Production | Takeko Masanobu | Production Assistant |
| Production | Sachi Hamano | Producer |
