The Angel's Last Dance

Caelum -- an angel who has fought through eons of war to eradicate all evil -- was sent to retrieve a key relic of the demons -- a crown. All angels sent on this mission were said to never return. YEt here Caelum is, relic forgotten, but standing strong(?). Caelum catches a glimpse on the true nature of the war. Is he ready to take on the brunt of it? To participate in a rebellion against the very beings he was created by?

And maybe -- just maybe -- can he fall in love along the way?