the reason Nishioka rejected Saku is either because he noticed Arikawa's feelings and he wants Arikawa to be with her, or he simply doesn't think he can be with Saku due to his lack of commitment and doesn't want to hurt her worse...
@ElBichoRaro You're definitely wrong on one account, but it's a short series so you (hopefully) won't have to wait long to find out.
@snowwater When I read this series on otakumole, this was actually chapter 5, with chapter 4 being one from Arikawa's perspective. Did you skip that chapter, or is it in a different order?
@Comrade-Sandvich I wish I could, but otakumole, where I read most of it in English, is a private, members' only archive site that is currently not accepting new registrations.
If you're willing to "read" in Japanese, you can download the raws from: http://manga-zip.net/archives/196135.html
@FredFriendly I know, kinda disappointed about otakumole being no longer open to registration (must be due to people taking content and uploading it everywhere).
@Comrade-Sandvich I don't know if that was the case originally, but now, like Cookie Revolution Scans, there are huge, obnoxious watermarks (though less so that CRS's) on every single page so you'd definitely know where they came from. Plus, the translations are not hard-wired on the pages, but use bubbler.me to display the text.
@FredFriendly I'm not really sure of which chapter ordering was used in OM, probably following magazine releases, but what we have now are the 2 published volumes of the manga and we're following the chapter order there. I'm not sure if Arikawa's chapter appears later on or something, but yeah I was also quite confused at first when I noticed these differences