longterm The man from outer space and his cute girlfriend (a superman and lois lane type of thing but kinkier~)

It's a simple plot and I'm too tired to give the in world preamble, human looking alien from outer space grew up on earth before meeting cute human they work with (i.e metroman, superman, brightburn) but a kinkier twist. I'm cool wih reverse roles like being a human male in a relationship with superwoman of some kind and I like either idea of maybe unexpected power dynamics of the human being the dom or leaning into the expecting and having the superman stand in be the dom. I'm flexible and can alter a plot either way because rigidness is boring plus we can always expand on a basic plot.