Kasumu Kirino’s Dokuro-chan Ripiru manga ended in the December issue of ASCII MediaWorks’ Dengeki Maoh magazine.
Story plot begins when a club-wielding title character Dokuro-chan is sent from the future to kill a middle school boy, but every time she kills him in fits of anger, she ends up resurrecting the boy in her attempt to redeem him.
Dengeki Maoh (電撃「マ）王), is a Japanese seinen magazine published by ASCII Media Works (formally MediaWorks). It first went on sale on October 27, 2005 and is sold every month on the twenty-seventh. The magazine features information on video games, manga, and light novels. A special edition version of the magazine called Dengeki Black Maoh is published quarterly.
Description from [Source]