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 have something I couldn't 
reveal to that girl.
ثمّة أمر لم أستطع الكشف عنه لتلك الفتاة
Ich konnte diesem Mädchen
auch etwas nicht anvertrauen.
Yo no pude decirle una cosa a esa chica.
Yo no pude decirle una cosa a esa chica.
Moi-même,
je n’ai pas osé le dire…
Anch'io ho taciuto delle cose a quella ragazza.
Eu mesmo tive que esconder
algo daquela garota...
Я не сказал кое-что девушке.