is a Japanese 4-panel manga series written and illustrated by Komata Mikami, which began serialization in Houbunsha's Manga Time Kirara magazine from April 2008 issue. An anime television adaptation by Kinema Citrus aired in Japan between April and June 2013. An original video animation was released on February 22, 2017. The series' name is derived from the term .
The series follows the daily lives of three high school girls: the intelligent but childish Yuzuko, the kind but airheaded Yukari, and the mature and easily irritated Yui, who are all part of their school's . As the girls spend their days having meaningless discussions, they occasionally come up with topics to research while in their clubroom.
The original manga by Komata Mikami began serialization in Houbunsha's Manga Time Kirara magazine from April 2008. The first tankà Âbon volume of the manga was released March 26, 2009, and fifteen volumes have been published as of September 27, 2025.
The anime television adaptation is produced by Kinema Citrus and is directed by Kaori. Series composition is done by Natsuko Takahashi and character design by Hisayuki Tabata. The series aired between April 9 and June 26, 2013, and was simulcast with by Crunchyroll. The opening theme is by Rumi à Âkubo, Risa Taneda and Minami Tsuda, while the ending theme is "Affection" by Mayumi Morinaga. Sentai Filmworks licensed the series in North America and released it on subtitled DVD on July 1, 2014. An original video animation episode was released in Japan on February 22, 2017. The opening and ending themes respectively are and , both performed by à Âkubo, Tsuda, and Taneda. In March 17, 2026, the anime debuted on the HIDIVE platform, with Comic Book stating that the series had yet to be "renewed for a second season".
Characters from the series appear alongside other Manga Time Kirara characters in the 2017 mobile RPG, Kirara Fantasia.