
I'm confused. Was there a chapter that I missed? where did that girl come from. The one who misunderstood yuki

It was in this chapter. http://www.mangago.zone/read-manga/tadaima_okaeri/uu/iur_chapter-4.2/pg-1/

Please read this on the app, WebComics. This is where they officially upload the chapters and there are already over 100 chapters over there

They might have more chapters out technically, but they upload each part (1.1, 1.2, etc) as a separate chapter so it's kind of misleading.
The scans are at about "72" while the official is on "106". So yes they're ahead, but eh. Their quality is worse than the scan imo, even if the scan has off moments here and there it's so much easier to read.
I wished the author spaced out the story a bit more. the first few chapters felt rushed and got me really confused
i feel like there’s gonna be another pt and the fl will like cut off him or smth AGHHHH i can feel the drama drawing near
I do understand the getting to the point portion, but it feels like Seunghyun needs to be more of a piece of shit, and then maybe Namjoon(?) Oppa would've shown his shitty side later, or somewhere along the line of Eunseo changing and was like "Huh? You thought I was falling for you?" And turn it into something that they were both playing at.
Along the way sprinkle in Jinha being Jinha, and also include the rather darker past where during piano recital he called her Miss/my lady so she would be exposed.
Could also be that he (Jinha) was more attuned to his grandfather/being closer to the grandfather that he listened and treated Eunseo like a real lady when they first met, then got tired of it and that's why did not defend her during a few incidents etc.