I wasn't sure about this series based on the first two chapters, but I'm definitely interested to see where this goes now. I like their relationship more than I thought I would, at least so far. Chapter 7 showed Nagi's POV, which turned out to be less yandere than everyone (including me!) was expecting. Her being completely flustered by how forward drunk!Chi was being helped with that, too.
Also definitely agreeing that the ex is an asshole - I'm usually not one to judge to much based on first impressions, but this seems pretty clear-cut based on what he says and how desperate he seems.
The editor is also a bit of a creep, but at least Nagi's words seem to have gotten through and he's trying to be kinder. I'm not sure how much of a love triangle this'll become though - Chi seems completely uninterested in him romantically.