I know everyone has pointed this out already, and I might be wrong, but it honestly seems like a kind of unhealthy marriage if he's still THIS flustered at the thought of touching her. I know the teasing is the main point of the series, but it would've been possible to dial it down just a bit, because at this point it seems impossible that he could've agreed to marry her. It seems like he hasn't matured or grown as a person at all. In the main series, you knew that they were going to get together eventually, and I figured there'd be a point where he'd have a full confession and would grow a bit more comfortable around her, so it just feels kind of unsatisfying and unfulfilling to have this be the future of their relationship. I really like most of this series and its interactions, but I feel like the way Nishikata acts is the one problem with it.