The title says it all.
God said let there be light, Angel Aceline said let there be gays.
After getting banished from the heavens for supporting homosexuality, Aceline is stripped of the angel status. If that doesn't dull her shine, even hell rejected her. The only place she can reside is Earth, as an immortal. An immortal forced to go to school.
Her journey as the awkward fallen angel puts her into the shoes of the homosexuals she supported and was punished for. Eventually, her past catches up on her and she needs to make a choice.
(In this book, you'll meet an angel that asks what a dick is. A gay boy that gives free bicycles. And a god you will hate)