Hooray, the Ojousama books are complete! As mentioned before, this bonus book contains chapter 3 and 4 from the main book, with some alterations. I didn't copy the old translations, so some lines may differ since they actually do differ from the two versions (not only the swimsuit line, some lines are just totally different), and there might be some variations from the old dialog since there isn't a single way to translate a line.
Here's the batch for the whole main book: link
RS | MU | FU