Bird Family au

An AU of my creation with the premise, what if Yuu was Crowleys long lost child? oh yeah and Neige is here too. Dire Crowely was a simple man, just having been part of a war, which luckily they had won. But one doesnt fight against their own race and throw their lot in with the fae and not face some consequnce. one night an old enemy sneaks in and banishes his baby to another world in revenge. but what happens 15 years later when that child somehow comes home, without their magic but they have a weird cat demon?