Gag Manga Days

, also known as Gag Manga Biyori, is a manga serialized in Monthly Shōnen Jump until July 2007 where the serialization continued in its monthly successor, Jump Square. The series ended in November 2014 and was followed by Masuda Kōsuke Gekijō Gag Manga Biyori GB.

Its first anime adaptation was a short film animated by Toei as part of Jump Festa in 2002, with the first two seasons were produced by Artland, and the third and fourth by Studio Deen. The 5-minute episodes are selective-based on the manga chapters.

Plot
The story has no plot, just random and nonsensical but hyperactive, random side-stories revolving around various plots and characters throughout the series.