I knew going into this chapter that the mobs would show up. Beach/pool episodes are opportunities for low-effort fanservice (bikinis), and
all the girls have to be shown off, of course. I was wrong about the number of mobs showing up, though--just one, Flat Chest. It's really annoying that they show up so often--there are tons of romcom series with girls like each one of those mobs as the main girl/winner of the romantic competition, with girls like Mone-san frequently existing only in the sidelines or being sidelined. Now, a girl like Mone-san finally has a series about her relationship with her boyfriend, and mobs like Flat Chest must keep showing their face. As much as I like Mone-san and the original idea of the story, the author failed (mostly) as soon as he started letting the mobs take over the story. Regarding what Flat Chest did, and if I were Haruta, I'd have told her to go build some sand mounds on her chest and went back to Mone--and then told Mone that she was there...and what she attempted to do to
the both of us. People like Flat Chest take the power you let them have.
That said, I'm willing to bet Shorthair Pantyhose and Mangirl will show up before long.
@zhako1: Because seemingly all of the people who comment on Mangadex have been conditioned to hate traditionally attractive and feminine women. Mone-san has a combination of many traditionally attractive and feminine features: characterwise, she's genuinely kind and caring, graceful, soft, and ardently loving of her boyfriend without attached strings or subversive/counterproductive attendant behaviors (e.g., manipulativeness, abusiveness--the physical variety of which is common among the modern tsundere and the pseudo-Puritan butch "tomboy" type); physically, she has long hair, large breasts, and a taste for clothes that are unmistakably feminine, and a pretty face with features that reflect her character as described previously--to name only a few things in both regards.
In Yuuhiin's first (by all that is right and just, neither she nor the other mobs should have more than one chapter dedicated to them, not to speak of entire arcs) arc, it was made clear that she was not possessed of a winning character--she did what she wanted regardless of the circumstances of anyone near her or any rules in place, and she never thought of the possibility of stepping on anyone's toes--but is, of course, keenly capable of taking offense, as she verbally squared off with Haruta twice between her two chapters. What she did in this chapter is no surprise if A) your eyes are open, and B) you have working, proper morals and a proper sense of ethics; in addition to what she did before, now it's been confirmed (by Haruta's memory and her demand at the end) that she's also a homewrecker (or wouldn't mind being one) and a manipulative snob--a person of vicious character. All of these are the case, and you still have people like those you see in this comment section lusting for her undeveloped body.