There is a lot going on in this volume and they feel like competing interests.
It seems like they wont consummate their relationship because the brother is too chicken shit. But that other people can see through their ruse and discern that they're siblings.
There's also the weird one sided crush from Gou, a guy, for Kei who is clueless. I like Gou, and he is popular with women.
Everyone is easily seen through. I wonder if they'll be found out and everything will just end between them?
How tragic!
This series is also way more recent. The 6th volume came out in like 2019/2020.
It's hard to root for the couple though. Even now. But I still want sex at least!