This is a chapter that I also like, largely because of how it frames Yamaoka's relationship with Dan. Dan presents himself as knightly, chivalrous, and sees this love rivalry as a battle for which he must be just and honest.
Yamaoka doesn't even realize he's in a love rivalry, and is just annoyed by the self-righteousness.
The thing I find especially fascinating is that Dan's conduct is clearly presented as being 'good'. This ties into the sensibilities of the author, and betrays something I don't think he intended. To him, Kurita is a 'prize' to be 'won' in a 'battle' of love. This is a perspective that would be less easily forgivable if it were written in 2020, but I'll overlook it since it's written in 1990 Japan.