It was serialized in Shueisha's Weekly Shōnen Jump from January 2018 to August 2020, with its chapters collected into 12 tankōbon volumes.

However, Kei catches the eye of the highly acclaimed director Sumiji Kuroyama, who steps forward with the intent of bringing out her full potential.

Shueisha also simultaneously published in English the series on the app and website Manga Plus starting in January 2019.

[11][12] On August 8, 2020, it was reported that Matsuki had been arrested for allegedly approaching and inappropriately touching two female middle school students in June 2020.

[13][14] Editors from Weekly Shōnen Jump stated that they would be taking the matter seriously,[15] and later announced the series would immediately end publication with the chapter released on August 11.

Despite regrets of having to end the manga mid-way, Usazaki urged fans of the series not to harass or blame the victims.

In June 2020, it was announced the manga would receive a stage play adaptation in 2022 titled Act-Age: Night on the Galactic Railroad (アクタージュ act-age～銀河鉄道の夜～).