Welp looks like the backstabbing cunt is going to die next. If MC lets him live, then it's pretty ironic considering he's shown to be merciless so far.
@daniel345 MC isn't someone she barely knows, she's been in love with the dude for a while. As others have stated, there's more to her backstory regarding Hajime. Plus, why would it even be NTR? NTR is only if Kaori was also in a relationship with mr. fake protagonist wannabe. She wasn't in a relationship with him, she never liked him, etc, so her going after Hajime isn't NTR at all. As someone who absolutely abhors NTR bullshit, I can tell you this isn't NTR at the slightest. At best, Kaori was a childhood friend of his and an (ex) party member. Honestly, I don't give a shit about her leaving the other party, they're full of idiots and good for nothings, but I do agree that I don't personally care much for Kaori as a character. You're right in that the other girls are way better. However, a huge part of the reason for that is because we've seen the other girls interact and build their relationship with MC throughout the course of this manga, so of course we feel more attached to them than Kaori who we've barely seen throughout the entire manga. Maybe as the plot progresses with her tagging along, we'll grow more accustomed to her and accept her as a legit part of the group down the road. But I do feel you when you say she feels very "meh."