Sannan has been using materials left behind by Kodo to continue to try to improve the medicine in secret. He drinks the medicine and transforms into something which is no longer human. After seeing the wound Sannan infected on Chizuru heal in an instant, Hijikata asks her if she's a rasetsu, but...
Later, the commotion over Sannan adds to the decision to move the Shinsengumi headquarters to Nishi Hongwanji. Chizuru continues to search for her father, but she is unable to find any clues to his whereabouts. Then one day, Chizuru happens to overhear Okita's secret.
I'd heard that joining up 
with humans had lead to their ruin.
سمعتُ بأنّ الانضمام للبشر قد أدّى إلى دمارهم
Wie ich hörte, führte ihre Vermischung
mit den Menschen zu ihrem Untergang.
Dicen que colaborar con los humanos
los llevó a la ruina.
Dicen que colaborar con los humanos
los llevó a la ruina.
Ils ont refusé de s’allier aux hommes
et ont périclité, dit-on.
Ho sentito che il suo legame con gli umani 
l'ha condotto alla rovina.
Dizem que sua aliança com os
humanos foi a causa de sua destruição.
Говорят, связь с людьми
привела их к краху.