All thanks to Genl. If you can't figure out how to get through the encryption shoot him a message, but try using some tools first.
Angel: "You were supposed to be a girl, but when I looked at you as a baby I realized such a cute baby would be food for a lot of lolicon stalkers, so I turned you into a boy. Except you turned into a womanizer who ate girls, and I've come to fix the mistake."
(Once he turns into the angel's ideal girl, he feels no regrets anymore and passes into Nirvana.)
Aoi: The ending isn't like that. MC changes back into a boy and his friend expresses regret because he was super cute, etc. MC goes off and has sex with a girl again and wakes up as a girl. The ending is him saying it seems like his body has now fallen into a state where he changes gender every time he has sex. Tells the friend "Yoroshiku!" and it ends.