I agree with Kraco... he didn't use the horn even though he told Murasaki a few minutes before that he was going to use it to protect her, or something towards that effect.

Even though Yayoi lost too, I thought she put up more of a fight than Shinkurou did, I didn't buy his attempt... he's just a weakass character that clearly had zero resolution.

It's even worse if he goes full pedophile on us... the storyline is quite sick as it is already, and that Murasaki wasn'ts to get into his pants, and he doesn't seem to mind at all.