Yusuke is complaining about how tired he is after killing Gouki and he better get home quick. All the sudden the compase start beeping to warn as incoming youkai. It is Kurama (I always start jump up and down at this part.), Kurama requests that he be granted a 3 day wait. After the 3 days, Kurama will return the mirror and give himself up. While Botan dosen't believe this and think it is a trap, Yusuke had second thoughts and agreed to wait.
After 3 days, Yusuke had totally forgot about the mirror when Kurama showed up at his school and took him to a hospital to meet someone. On the rooftop of the hospital, Kurama tells Yusuke that He is actually a youko(Fox spirit), a famous thief in the maikai(Demon world) that was serveral hundred years old. He was forced to posses a human embryo because his original body had been wounded fatally bu a hunter and was reborn as Minamino Shuichi, the woman Kurama had shown Yusuke was his mother, Minamino Shiori. She had milted Kurama cold heart because she had sacrificed herself to save him when he was young that had left her permanant scars on her hands. Kurama only stole the mirror because he want to cure his human mother who had been sick for a long time (His human father had passes away a while ago). Yusuke asks why is he been told all this, Kurama replys that he wants someone to know his side of the story.
Shiori's boyfriend suddenly rushed in to the scene and shouting that Shiori's condition had suddenly worsened. The doctors give no garantee if she'll survive or not. Kurama decided it is time to use the mirror. Yusuke point out that the only way to get your wish granted was to asacrifice something and if Kurama know what it is. Kurama answered: "Life". Kurama called on the power of the mirror and the mirror agree to grant his wish, which is for Shiori's happieness, in exchange of Kurama's life, which Kurama also agreed.
As the mirror is sucking the life out of Kurama, Yusuke suddenly jumps in and ask if the mirror will take some of his life so that Kurama will still live with his wish granted. Kurama shouts that Yusuke is stupid and what is he doing this for. Yusuke only reply that one should not make one's mother sad. A huge light shines then, nothing.
Kurama wakes up, finding himself still alive, not bothering with Yusuke, and ran to see if Shiori is okay or not. Yusuke wakes up after he left, wondering what the heck did he do that for. But he still obtained the mirror. The mirror had decided not to take anyone's life because of Yusuke's noble (and stupid) sacrifice. Kurama runs into room 501, finding his mother recovering, he than promises to stay and not go anywhere.
Yusuke also goes home, and offer to cook diner for that night, Atsuko wonder if it is really her son.