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.
then it's my fault, too, 
for bringing him here.
هي غلطتي أيضاً لإحضاري له إلى هنا
dann ist das meine Schuld,
weil ich ihn herbrachte.
Entonces, es culpa mía por traerlo.
Entonces, es culpa mía por traerlo.
je suis responsable,
puisque je l’ai invité.
allora è anche colpa mia
 per averlo portato qui.
Então a culpa é minha por trazê-lo a nós.
значит,
ответственность лежит и на мне.