B-But this one is in past tense unless I lapsed somewhere? Maybe you meant because I usually write in present tense? I wrote this one in past because I thought it helped with it being set in the past. I also think writing in past tense allows for simpler vocabulary except in the additional have/hads.
Matthew and Shun are important, yes. In case it was not clear, Shun is the protagonist in the first installment, too. I think that was clear but he was not so-named then.