Welcome to Asagaya Art High School Film Section (阿佐ヶ谷芸術高校映像科へようこそ Asagaya Geijutsu Kōkō Eizō-ka e Yōkoso) is an one-shot manga chapter that was released in Weekly Shōnen Jump Magazine. Story was written by Tatsuya Matsuki and Art was drawn by Shiro Usazaki. This one-shot chapter was included in Weekly Shōnen Jump Issue #9 2017 that was released on February 6, 2017. This is the prototype of currently serialized manga Act-Age.
- This one-shot manga take place ten years before the beginning of Act-Age manga series. It was confirmed by Yuki and Kuroyama's age in this one-shot manga. (Yuki was 15 years old and Kuroyama was 30 years old)