My dude basically have the most broken shit yet his subordinates disown him and dismiss him from his position as the heavenly monarch because they look him as a "weak" person. Then the MC will go on a journey with his newfounded harem and somehow in a later time will face his former mates and...
I find the MC somehow stupid and lack of common understanding about the world. I know he's reincarnated person with destructive power and abilities in his previous world but when he's reincarnated again to this current world, does he ever learn or just see about the power limit or the average...
I have seen pretty much other combinations like :
Orc x human
Orc x elr
Orc x beastman
Human x elf
Human x beastman
Elf x beastman
Slime x everything and vice versa
But this... is really something else