Wasteful Days of High School Girls[2] (女子高生の無駄づかい, Joshi Kōsei no Mudazukai) is a Japanese manga series by Bino, serialized online via Niconico Seiga, Comic Newtype, and pixiv Comic websites since 2014.

An anime television series adaptation by Passione aired from July to September 2019.

On June 9, 2021, it was announced the manga would go on a hiatus after the author Bino gave birth to her first child.

[3] The names and nicknames of all the characters are puns and allusions to the central "quirk" of their personality.

[23] The series aired from July 5 to September 20, 2019 on AT-X, Tokyo MX, TVA, KBS, SUN, and BS11.

[7][24] Chinatsu Akasaki, Haruka Tomatsu, and Aki Toyosaki performed the series' opening theme song "Wa!