Ok guys, Chapter 6 RAW is out but remember that we are not adding anything of into the wiki until it is released in English. That's why I'm adding it here so read at your own risk.
The chapter name is Iron Fire again. I'm serious. I don't know why the mangaka would reuse the name of Chapter 2, but he did. when this chapter gets released in English, we'll have some things to discuss about chapter pages. Yuki is revealed to be the rabbit girl and she joins in the fight against Numazawa and they finally defeat him.