There are going to be some spoilers here so just warning in advance.
First of all, he added romance and I promised a bad review if he did. Usually I avoid romance, so it just wasted time. This stuff also has cliches, despite having a somewhat decent idea. He leaves root extremely quick, so what's the point? Also, mc meets this dud just for him to die a few chapters later. Am I really supposed to care about this guy who was mentioned like 3 times in the novel? Well the mc does. It's not like he doesn't know what danzo is all about.