Yes, it's vanilla but not in the traditional sense. He should find someone who can treasure him but whatever, it ain't my life. She ain't an absolute scumbag so there's that.
I need a sequel where one of them is about to get married & the girl FINALLY wakes up & Tsunderes the fuck out of him begging him not to leave her . Wholesome vanilla ending for sure 💯
But you can all but guarantee that would upset her more than anything. Women like her only realise what they have when they discover they can no longer take it for granted. That usually happens once they have either lost it or are about to lose it due to their lack of care and attention.
Just maybe Hiroya-kun should take Yuuri's advice (Page 7) and go find himself a stunning older babe (a.k.a. "Sexy Onee-san"), leaving her to pursue her gold-digger plans.
Of course, if Hinahara-sensei wants to produce a sequel to this, I'll check it out willingly.