I’m choosing the believe in the author for now. But damn I wish this series had a novel… would quell some anxieties lol.
I'm confident because we've already had points of "drama" where Hinagi was involved, and when we first get the full rundown of Youta's trauma back in the first volume leading up to its final chapter, 17.
There's been a necessarily-involved sequence of chapters that focus primarily on Youta and Houjou's relationship and dynamic, but that's important because we need a foundation built for them that has actual substance to it; she's the one who'll prove the exception to the established rule that underpins Youta's trauma, after all, so a large portion of the series to this point being about the two of them, specifically, is how that gets laid out in a believable manner.
But the issue of Youta's struggles was always going to be the Big Point that needs addressing, and it's necessarily wrapped up in the way Reiya is perceived, their relationship as siblings, and Houjou's involvement with Youta and the various facets of his life—which of course include Reiya.
And I think at least a significant number of people in these comments who are lamenting and complaining about "misunderstandings" are stuck on how much of the series to this point has focused on the relationship between Youta and Houjou, and have misidentified it as a "fluffy feelgood sugar series". It's not; it's a coming-of-age series that revolves around growing up and pushing through/moving beyond the things that stunt one's way of truly embracing the world around them. Youta has his friend group, but he's untrusting of a whole swath of his peers, and for good reason—but he needs to get through that. Houjou is the way that happens, and he helps her in turn, and they grow together.
That is the series. And what's happening now is both important to seeing Youta grow,
and I would argue has been telegraphed more than adequately by the author, and that I would argue that the author has laid out the various pieces in a wonderful manner: we have Reiya's backstory; the fleshed-out dynamic between the two siblings and the nuance in how Youta relates to Reiya and separates his brother from the trauma inflicted by all the girls in their school; we have the relationship between Houjou and Youta fleshed out over a large portion of the series, filled with his constant questioning and suspicion that evolves over time into trust and a willingness to let her in. And now we have everything coming to a head, and Youta's growth being put to the test right alongside Reiya's own struggles coming to the forefront.
The other part of it is that there's no "villain" of this series, and so some readers are shoving Reiya into that narrative position when he's simply not going to fit into that role. He's got his own arc and growth to undergo, and I suspect Youta will be helping him in that regard just as much as Reiya will be helping Youta.
And all of this, to me, is pretty apparent in what's been shown to us thus far. I think the author's done a fine job up to this point, which is why I'm excited for what's to come and am not unduly worried about the author flubbing it. They've shown they can juggle dramatic tension and cute lightweight moments of romcom fluff, so I don't seem them screwing up now, if they're allowed to tell the story they clearly have in mind.