The episode us refered to in the second season but this is only a side story. The thing is this episode is an outlier compared to the rest of the series. Changes: Ekaterina Kurae is shown as one whose has compassion for her enemies and this time instead of killing them off in a sadistic fashion, she just handicaps them. Also Ekaterina Kurae shows off a little nip which the anime and manga try to refrain from doing due to how young she looks. Then during a scene where Sasha and Otori were caught peeking at the girls while they were getting their measurements, a simple trapin which a log that is tied up comes down and sends them flying. Sasha and Otori should have be able to dodge them, especially Otori as he was as overpowered as they come. Basically this episode messes up the personalities of the characters quite a bit.