Ryuzaki, an editor of Muscle Magazine, which features photographs of men with sculpted bodies, becomes involved with a man named Kitami; their affair soon becomes dominated by sadomasochistic games, with a horrid result. Jump ahead one year, Ryuzaki is released from jail and goes in search of Kitami, perhaps to make amends.
Unfortunately the movie Muscle is not yet available on HBO Max.
| Directing | Hisayasu Satô | Director |
| Writing | Shirô Yumeno | Writer |
| Editing | Shōji Sakai | Editor |
| Camera | Kōichi Saitō | Director of Photography |
| Sound | So Hayakawa | Original Music Composer |
| Production | Shūji Kataoka | Executive Producer |
| Lighting | Hiromi Kato | Gaffer |
| Directing | Tadami Ohara | Second Assistant Director |
| Directing | Takahisa Zeze | First Assistant Director |
| Camera | Fumio Sato | Assistant Camera |
| Lighting | Kiyoshi Matsumoto | Assistant Gaffer |
| Production | Tatsuro Komada | Development Producer |
