Tryst Under The War [BL, Omegaverse,Action]

Rius is an inexperienced dominant omega if not more dominant than a normal dominant omega who is strangled by the marriage that was arranged but to his knowledge he doesn't even know who is his arranged partner yet he meets an alpha who along the way fell in love with him. On his way to the stadium he is brought to the Phantasmal Realm in an accident by the light jellies and fought a goddess who is unknown to him, after surviving the battle he reunited with the alpha whom he newly met with the unforeseen future coming to them, can they change the fates design?