She's got stars in her eyes.... Instant yikes. Those are never good.
I think it's interesting to have a Karin out of the bunch that's willing to have you all to herself and , I assume by the actions of if she wins, wipe all the karins out and have it only be her left. Someone had to be that Karin.
It definitely wouldn't happen in this manga, but it would be something if not every Karin that spawns in is cool with the whole harem idea (completely understandable) and that he would lose a few karins along the way. Yeah that's not happening here for sure.
Thanks for the chapter