Kai Pai La! Guaishou Da Dianying
English title: Action Monster Big Movie
Japanese title: 开拍啦！怪兽大电影
Type: ONA
Source: Original
Status: Not yet aired
Aired: Not available
Duration: Unknown
Studios: HuaMei Animation
Producers: bilibili
Genres: Comedy, Supernatural

Following a decline in the amount of monster movies created, Meng Qi, a director who is obsessed with the monster movie genre, becomes unsure about his persistence—he never expected that one day an actual monster would appear in front of him! In order to fulfill his dream, Meng Qi decides to cooperate with the demon girl Liya and help her shoot a demon themed movie. However, as the shooting progresses, Meng Qi discovers that things in the other world are closely related to him...

(Source: Bilibili, translated)