A dead body in a suitcase is found on a mountain. The body is identified as Takao Honma. 3 years ago, he was kidnapped by Rika Amamiya and went missing. Detective Jiro Okuyama tries to catch Rika Amamiya. He uses a dating app, while using a fake name, and finally finds Rika Amamiya, but he becomes attracted to Rika Amamiya.
Unfortunately the movie Rika - Jisho 28 Sai no Junai Monster is not yet available on HBO Max.
| Crew | Toshihiko Shiraishi | Cinematography |
| Production | Miwako Kurihara | Producer |
| Directing | Tsukuru Matsuki | Director |
| Writing | Kisa Miura | Screenplay |
| Writing | Takahisa Igarashi | Novel |
