The hatred that lurks in the heart

Exploration Stage: Christmas Hall
From: Hanako
Description: As I said before, Inugami is the spirit of a dog that was terribly mistreated by humans, but it is not impossible to remove anger and hatred from its heart. After calming the anger of Inugami, we should use higanbana (higanbana flowers) for purification. Can you please help me find higanbana?
Completed: You have found the purifying higanbana! It is thought to be an otherworldly flower, also called "the flower that blooms in the heavens," and if picked during the autumnal equinox, when the line between the two worlds fades, the flower is said to gain magical powers.