Bludgeoning Angel Dokuro-chan

A guy named Sakura is destined to develop the technology for everlasting life, which, as a result of Sakura's lolicon tendencies, stops all women from aging after the age of twelve. God forbids this, so he sends his angels into the past to put an end to Sakura's life before he can carry out his plan. However, Dokuro-chan, one of the angels, decides to try to alter the future without murdering the man. The problem is that Dokuro is highly unstable, and she is continuously killing Sakura (and many other people) in incredibly gruesome ways with her massive spiked club. It's a good thing she can resurrect people, even if it's just to brutally murder them once more when she gets angry.