Just a small idea I had

Yuto

He'd still treat Yuya the same way he does to him now, except with less surprise hugs from behind. Yuto would very much be afraid of accidentally grabbing her boobs and being labeled a pervert from then on. During Yuya's time though, it would be hard for Yuya to get mad at Yuto for he'll take every word she'd yell at him (like if she was complaining about cramps or was angry at Reiji) and does his best to fix her every lil problem.

Yugo

Well he'd pretty much be the same too, except he wouldn't follow Yuya into the bathroom (though he'd definitely try occasionally), and there'll be a lot more hugs. While he doesn't show it, Yugo does like boobs. They're nice and squishy, a great place to rest your head on for a small nap after a days work. Yugo would also make sure his freezer was stacked to the brim with all sorts of ice cream for when Yuya's time came.

Yuri

*insert laughing here* OH BOY!! Well, for starters, I'm sure Yuya wouldn't be a virgin anymore. Yuri would also get Yuya to dress up for him in more revealing clothes or maid outfits. And the semi-best part? When it's Yuya's time, Yuri would give Yuya one of his plants to literally drink her blood from right out of her (she usually declines, which he'll ignore, so she hides during her time with Yugo who'd, again, have ice cream, which Yuri realizes and goes on a hunting spree not realizing they're now hiding with Jack Atlas). Another fact is that, in public, Yuri would act like the perfect gentlemen for Yuya but when they're alone, Yuri goes all perverted.

Sora

Well Sora would act somewhat differently. He'd be more than happy to jump onto Yuya for a hug while Yuya would be more willing to go out and buy candy as long as they go with Yuzu. Sora is more innocent when he jumps and doesn't realize that Yuya's boobs aren't for touching without her consent at first. He'd think of them as pillows. As for when it's Yuya's time, Sora would give her free access to his candy pile to get those cravings down, but he won't do anything afterwards. He'd be too scared.

Shingo

Well, more flirting, more touching, more vain comments, and more spoiling. Yuya would definitely feel more like a girl with Shingo basically putting everything she'd ever wants at her mercy. Especially when it's her time (Shingo learned out the hard way to NOT upset a girl on her period.)

Reiji

Nearly the same with Shingo except he'd have removed the cameras from her room, not as much flirting, vain comments, and he was more prepared when it was her time thanks to his mother. There were pads everywhere along with sweets and heating pads. It was a female utopia

Yuzu

Now with Yuzu, it would've taken a little bit of more time than it had for them to have started dating, but once they did, boy did it bloom quickly! Yuzu and Yuya watched more anime together (YURI ON ICE!!!), they both went to the bathroom together, and they supported each other when the other one's time came. Skip thought of Yuya as a second daughter too.

Mob Boss Yuto

Somewhat close to Yuto's. Differences:

M.B.Yuto would actually hug Yuya from behind more just to feel her chest. He'd make her dress up in giant ball gowns and he'd actually would've taken her virginity. Yuto would flirt more too. And he was the most prepared (except from Yuzu and Reiji) when it was her time. Basically whatever Yuya said, goes. Kill that random man who bought ice cream without sharing me some even though I don't know him? Done! (Though they faked his death just to make her happy and for when she regrets it, they'll show her that he was alive the entire time). Get you the entire candy store? You got it!