 When Eigetsu has only one month left to live, Sa province is plagued by an epidemic which he recognizes as the same disease that wiped out his native village.He tells Kōrin about his imminent fate and confessed his feelings to her, then sets out by himself to the affected area in the hope of directly helping some people before his death.But when Eigetsu's life is due to end, Yougetsu decides to go into a deep sleep to let Eigetsu keep living.