8 chapters that hasn't been translated yet but you can check out free few pages from cmoa.jp. nothing happened between chako and isshin that's for sure. Isshin got injured from that psycho and it definitely have a huge impact on the competition. It seems that Isshin is related to a family who's also in tea farming/making and they had a fallout. There's a middle aged lady who's similar to Isshin so it might be his mom. Unfortunately they didn't win on the competition (oh Chako participated instead of her bro) and Roa made a livestream I guess to clear about Isshin and Chako.
For me I like it. I think we just need further chapters to understand more about Eric. He might be 'using' Petra but for someone who's really knowledgeable like her, it's a win to have a platform for her to shine so it's kind if a win win situation for both of them. But I'm really interested about Petra's career more and how can she gagged the patriarch haha