And there we have it, Kyou no Yuiko-san ① ends with this release. To be honest, this is the first time I had to translate up to the Afterword. And I can say, I'll keep on working on this project. :3 Yuiko-san is really cute. That's a given. She is stubborn, yet she has the most insecurities of them all. That is why I will not call her a tsundere. Stubbornness does not always equate to being tsuntsun. I cannot even imagine Yuiko-san hating Tadano before they got that close. Thus, I won't put that overused stereotype to her. Maybe I'll be proven wrong, but that will come later. For now, this is my opinion upon reading it untouched by my translation. I just hope that this is evident upon how I translate it.
TL;DR: Volume 1 is finished. Yuiko-san is not tsundere. For me, at least.
Chapter 10 + Omake and Afterword
PS: Sorry for the late post, was in school earlier, I can't upload to MF and Mirrorcreator