It's really good—10/10—especially the story and the design, which were truly the best parts.
I just hope the main characters get more stories; as a couple, they are truly better than the pairing with Nagatoro.
Honestly, I don't think a future relationship with Nagatoro would work out as a family because the protagonist has such a WEAK CHARACTER... just look at Nagatoro's siblings—they are absolute TRASH—and it would be even worse if Nagatoro were to live with the protagonist.
It's a shame that Sana Sunomiya was the best romantic option for the protagonist, but the "idiot" author insisted on pairing him with Nagatoro—a character the world actually hated. In the end, he had no choice but to tone down the BULLYING and introduce "other" extras so Nagatoro wouldn't come off as the VILLAIN... but as I said, I don't think they'd last as a family in the future due to the protagonist's WEAKNESS; I think she'd end up running away from him in a real-life scenario.
Anyway, putting that aside, I really like Sana Sunomiya's character—especially her looks. It's a real shame Naoto Hachiouji didn't accept her as his girlfriend back when he was with her before meeting Nagatoro.
But I love the idea of Sana Sunomiya and Naoto Hachiouji as an "alternative" couple in a different world; like I said, I'd love to see more stories like that.
Looking forward to seeing more of these two protagonists in future chapters.