So you want a cheating top, but can't let go of their partner because they are horny? You want the uke to be a doormant then, well congrats, that is 80% of cheating plots in yaoi, you'll find one in no time.
*doormat
Yes, sister! Unfortunately, I'm yet to encounter where the top is cheating with the bottom, it's always on the bottom. If you have some of that, let me know miss Terry Joe
So you mean this time the MCs are the ones cheating together on another person and not from the perspective of the uke being cheated on yes?
Yep. Like the MC unknowingly (or knowingly) make the top head over heels for him even though the top is currently in a relationship.
I always see here people talk about the seme cheating on the uke. How about we give it a twist? The top is cheating WITH the MC. Whether the bottom MC knows, or oblivious to the fact that the top is in fact, with someone else; but the top can't help but be allured and lust after the MC. How about that? Y'all know some BL like that?