To be honest, I haven't been following this manga properly ever since that arc where they went on a school trip or something, I can barely remember, and yeah, checking some bits here and there only makes me realized that there is barely much progression between both Koyuki and Konatsu, which is weird because I thought that these two were close earlier, but somewhat falls apart so easily later??? Yeah, I knew it's probably gotta have something to do with that jealousy stuff but I kept thinking, are these two really that fragile? Well, Koyuki anyway seems like so, which is understandable somewhat but get a grip, girl. It's probably realistic to have someone like her loitering around, heck, there are probably worse people out there that's such a drama queen but she's she and I really want her to make it easy for herself. Take some time to talk with Konatsu and let's carry the plot further to the point where they'd kiss and make up. Yeah, that's cool, right?
TLDR: Let's cut the drama and see something that is progressive going on.