So, is this an example of "Incest is the best. Have both sisters put each other to the test."
Eh?Fusou-san?Would you like to give training Yamashiro-san a go?Is it really fine, for me to train her?*Click*Is it time yet, Katori-san?Yamashiro... Doing such things in a place beyond my ken...Yamashiro-san, Fusou-san's training is in your hands....having such a woman staining her... I'd rather it be me...