I'm kinda tired of fixed uke and seme, so i'm looking for a couple which switch roles. I'd...

I'm kinda tired of fixed uke and seme, so i'm looking for a couple which switch roles. I'd like it not to have romantization of abusive relationship, rape and so on. I don't mind it being twisted, but it has to end as a tragedy. :P
Nways, thanks in advance! :D