So basically after the latest chapter I've come to the logical conclusion that Sinbad's and Kouen's egos are so massive that they can't stay within 10 feet of each other without some world-changing event happening.
I'm still getting more and more worried about Sinbad's plans with each chapter, that command he used on Kougyoku is a ticking time bomb and it'll probably be a point of conflict for him and someone else later on (probably alibaba and co.)
P.S. TitusxMalga, the author is going to make it happen, poor Titus is going to bear the brunt of the lolicon jokes of the series from now on.