User blog comment:IamJakuhoRaikoben/Chapter 415: And It Shall Become Your Will To Live, Review./@comment-7418318-20150110184602/@comment-9595671-20150110191851

It could just be a small oversight, and they'll probably amend it in the anime when we get to this point.

Plus there's the fact that it might be a spoiler to know it right now