Omegaverse bl/yaoi

Hey looking for this one bl with The prince being bonded to the Grand duke whose way much older than him or twice as much and he strives to undo that bond through a black hair alpha whose specailses in those things but is also the alpha servant that got tied up with tge prince during a premature heat and got banned from the kingdom. I think some where in the middle of the story the prince dies and goes back to when he ws younger and tries to change the outcome of events.