Manga Time Kirara is a Japanese magazine published by Houbunsha serializing mainly four-panel seinen manga. Issued on the ninth of each month, it was first published as a special edition of Houbunsha magazine Manga Time on 17 May 2002. Characters from the magazine appear in crossover role-playing game Kirara Fantasia.

K-On! is a Japanese four-panel manga series written and illustrated by Kakifly. It was serialized in Houbunsha's Manga Time Kirara magazine between the May 2007 and October 2010 issues, and also serialized in Houbunsha's Manga Time Kirara Carat magazine. The manga relaunched from April 2011 to June 2012 with two separate storylines published in Manga Time Kirara and Manga Time Kirara Carat. The manga is licensed in North America by Yen Press. A spin-off manga about a different band of high school girls, K-On! Shuffle, began serialization in July 2018. The main series focuses on four young Japanese high school girls who join their school's light music club to try to save it from being abolished. However, they are the only four members of the club, one of which has little experience with guitar playing.