... OK but fair warning, my brain was College Finals Fried. Angel becomes a Magical Boy (kinda say that one coming at page 1) and investigates who is killing the Magical Girls and why. He tracks it down to a (cute) guy who hates Magical Girls because his sister died by getting in the crossfire between a Magical Girl and her Enemy. After meeting Angel and a Convent Time Lapse (in which there is plenty on Angst, Heart to Heart Conversation, and a Kiss on The Lips) The Bad Guy sees the Error of His Ways and they All Live Happily Ever After.
...hope you get a laugh out of this, it made more sense in my head, I swear.