Okay, at this point WHAT is the Slut's deal? She knows. Okay. Since when?
Before or after the last time she insulted him? Does she know Yamada likes him back? Cause being rude to your friend's crush when you know it's mutual is an uber alpha bitch move.
Unless the crush is an asshole/bitch, then by all means.
THIS is why I disagree with everyone discussing "progress" in this manga. What progress? Considering how much time they spend together, we the readers know her friends HAVE to know. I mean come on. But where's the progress? They act like they don't know (and I don't mean pretend), they insult him...but now she's nice? Why? Since when? What "progress"?