This year's 52nd issue of Shueisha 's Weekly Shonen Jump revealed that it will publish a new bonus chapter for Kaiu Shirai and Posuka Demizu's The Promised Neverland manga in the magazine's first 2021 issue, which will be released on December 7. It is a one-shot and will focus on Sister Krone's past and will feature a colorful page in the center.
Shirai and Demizu launched The Promised Neverland manga in Shueisha's Weekly Shonen Jump magazine in August 2016 and ended publication on June 15.
Source: ANN