Cynophobia
Castiel is a rare omega. Not only does he resent his place in society but has spent a lifetime suppressing his true instincts. He takes a night job as an emergency services dispatcher so he can hide away from a world he has no place in.Over the years Castiel has developed an obsessive and very real phobia for everything that threatens his solitude. He has recurring nightmares that terrify him and fill his mind with images of being taken and claimed against his will.He only wants to be left alone and unmated but fate must have other plans for him when he unexpectedly meets someone who seems to want to help.He starts to suspect his protector is actually an alpha male who wants to claim him for life. Castiel is scared he might not be able to stop himself from falling in love.