Wasn't Ryouta a massive creep anyway? (if I remember correctly, it's been years since I read the earlier chapters)
It's questionable but personally i don't think it bad. What he do is he his room room full of her pic, at first glanze it look upsettling af. But His family and Hibiki herself know it. He doesnt hide it, and you know him well enough to know there is no harm. To me i would say weird flex, but ok.
Why does this manga make me cheer for the most terrible person?
Beause deep down you know she is on the right. It is just sociaty will put her in bad light. That other girl litelray "oh she think herself so amazing, such narcissist. let me do horrible thing to her behind her back" ¯\
(ツ)/¯
If most people is as terrible as Hibiki already get to the hamory long ago. She simple don't play on other bullshit, but also mind her own bussiness, well most of the time. Like that girl may don't understand her and take it the wrong way. but if she just mind her own bussiness and don't pick a fight with her this wound never happen.
I'm wondering why the author is continuously egging us on about how Hibiki actually feels about Ryouta. I mean, is it so blatantly obvious that it doesn't need any specific addressing? Or is Hibiki just so absolutely sure Ryouta will never look at another woman, that she doesn't care what anyone else does? She looked so smug when the girl asked what he liked and Hibiki said 'me'; like she was telling the girl to just give up cause he'll only like her(Hibiki). Kind of a weird chapter title to focus on tbh; neither of them will ever have rivals.
She can think Ryouta wont look at other woman, and also don't care. She know he love her, and there are this girl she don't even know the name ? why waste enegy and time on her. Just as she said, she don't care about this girl romance. So she simple neither care about this girl give it a try or giving up. It simple not effect her. The smug is there before this girl show up.