D4DJ -The Story Of Happy Around!-

 is a manga series based on the D4DJ First Mix anime, and is illustrated by Moroko Kurasaki. It was serialized on the October 2020 issue of the Monthly Bushiroad magazine and features the members of Happy Around!. A physical volume was officially published by Bushiroad and KADOKAWA Co., Ltd. on April 26, 2021, along with D4DJ －4-koma mix!－.