Nabari no Ou S01 E18 The Voice that Calls Out

"Friend and foe prove difficult to tell apart."

Yoite's health is failing and he ends up in a hospital. He overhears the doctor telling Miharu that he has about a month to live. Scared, Yoite leaves the hospital, but not before using Kira on Gau, who was still in a coma. Gau recovers due to the effect of Kira. Miharu catches up with Yoite, who is remembering his past.