Ahhh ok I totally get Hiiragi now. Its must be infuriating for her hearing Tsubaki talk bad about herself when she doesn't have it that bad. At least she has friends like Kaname and Yatsude and she does well in school. I found it sweet that in times of distress she was thinking of Utsugi.
I found this chapter really entertaining but I hope 5yat the twins can resolve their differences and just be happy.