For the first half of the second volume, most of the things that will happen is to do with Hiro's training. In other words, it was a training arc where Hiro trains and breakthrough into the Rank-D.
However, Hiro Ernest has already reached that rank in this world. I don't know what led to it but it was a good change.
MC being strong is always good. I have to worry less about him dying if he was strong. I will feel kind of bad if Hiro dies when he is not supposed to according to the novel.
Anyways, there are not many problems in the first half of the second volume of the novel because it was all about training.
At least not for the MC. Though it was different for me. In my case, my parents' guild seem to be already in some kind of trouble.
Though the problem was not that serious or something that the current me can't handle. However, problems nonetheless were annoying.