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 Eizōka 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 of 2017 that was released on February 6, 2017. This is the prototype of currently serialized manga Act-Age.
This one-shot manga take place 5 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)