Grenadier is the story of an average spiky haired katana-wielding anime guy who through an unclear series of events meets a pacifistic blond gunwoman with boobs as big as her head. said woman also stores extra bullets in her cleavage and is able to pull some sort of wierd move where she thrusts her chest out and the bullets fly out of her cleavage and magically all face the right way and reload her gun. Fanservice aside the fight scenes are actually pretty cool and the quality of the art is pretty good if not exactly innovative. As far as the plot goes, for the first half of the series it's essentially Trigun only Vash has really big boobs and invites guys to take baths with her all the time in a completely platonic way.
Bokusatsu Tenshi Dokuro-chan which essentially means 'Club to Death Angel Dokuro-chan' is the story of one extremely unlucky boy and the bumbling angel who is trying to save his life but repeatedly kills him in the process. Dokuro-chan has been sent back from the future to stop said boy from inventing an eternal youth potion which leaves women as little girls forever by killing him. The only problem is that Dokuro-chan doesn't want to kill him and tries to prevent him from inventing it in other ways, like keeping him from doing his homework and distracting him in class. After all, if he doesn't get an education then he can't invent anything right? However there's one big problem with Dokuro-chan's solution, she keeps killing him with a truly vicious steel mace.

It's a good thing she can bring him back to life.... Bokusatsu Dokuro-chan is on youtube and is really short so you have no excuse not to watch it. It's like the WTF of FLCL and half the gore of End of Eva mixed with Hayat's (from Excel Saga) life span.