YESS, explanation to her, rather confusing, reasonings !! It was inevitable on such a good story though. Imo it was understandable before the whole Chinatsu and the company story, but confusing 'cause it just felt like something was missing and they went a long way here.
Instead of clearing the table of all the bullshit, she just keeps adding more bullshit to the table
Just adding what I think to what Vankomycin said: and isn't that human-like as shit? I share the same feeling of also liking the "HEA" endings 'cause it really is a great feeling of relief and payoff, but I'm -also- here for how romance can ACTUALLY happen irl, with the concept that the most realistic story we could get is the one that sometimes things makes no sense, and the most unrealistic stories are the ones where everything falls into place like a glove right away.
Romance, love, human connections are simply... not simple, Hiroko is going through her shit, doing things to deal with her own shit and ofc it didn't feel like clean waters exactly because, probably, her mindset is: I really, really love and cherish this amazing person who also treats me well, but this same person basically sacrificed something for me to succeed. Now there's this really new, very interesting and daring person wanting to interact with me in a way that could pretty much destroy what the other person sacrificed for. She even said in the last page "I'll make sure this chance will not go to waste". So I understand why there's shit on top of shit 'cause honestly, if I was in her shoes, I'd be confused as hell on what to do now too...
Personally, when a story has these many rocks on its path, if the ending end up to be "Happily ever after", the feeling of happiness and relief I'm gonna get for these characters to finally be happy after so many battles is far bigger than stories like Can't Defy the Lonely Girl, where the main couple had tense situations, but not as tense and as complex as Hiroko and Ayaka's. (It did have the potential, but I at least felt like Kashikaze wanted to water down things?)
But if it ends and they're not together I'm personally also ok with it... romance doesn't always works. If I wanna see pairings have their HEA at the end I'll just.. read another story.
Very very well-put, I was going to say as much myself, but you beat me to it and probably better than I would have ^^;