The fourth in a school romantic comedy that features a popular comic by Kazuto Okada starring Ayaka Morikawa and Ryouma Baba. One day, a love letter arrives under the Japanese language teacher, Tairaku Arihiko, at Otome High School. Around the same time, an incident occurred around the student, Aya Shirakaba, who was living with him...
Unfortunately the movie Not in Textbooks 4 is not yet available on HBO Max.
| Directing | Shota Sasaki | Director |
| Writing | Shota Sasaki | Screenplay |
| Crew | Kenichi Negishi | Cinematography |
| Camera | Kenichi Negishi | Director of Photography |
| Writing | Kazuto Okada | Comic Book |
| Crew | Kazuto Okada | Creator |
| Editing | Taichiro Natsume | Editor |
| Production | Kenji Komatsu | Executive Producer |
| Production | Koji Hoshino | Executive Producer |
| Production | Koji Kikuchi | Producer |
| Production | Takeshi Katayama | Producer |
| Production | Toshiaki Morihara | Producer |
| Writing | Tomonori Sasaki | Screenplay |
