>>2309895If I'm not mistaken, Bakkin picked up where the anime left off so the first of the later volumes they have would probably be it. I would recommend reading all that you can though since the content can be quite different because it's a manga and there are some un-animated chapters I think. Most of the anime volumes are untranslated but Bakkin has a separate team that is slowly translating those.
http://bakkinbakkingamu.com/