Mai stands there, still and dumbfounded. First she could not believe the fact she can see the shikis—the black wolf with the ferocious yellow eyes and black smoke-like substance clinging to its fur; the orange snake with jewel bright red eyes; and Shiroshiki—as clear as a picture. She could feel them, she vaguely saw their silhouettes before but this is new. Next she could feel the energy seeping out of Lin as he poured everything and merges with his familiars in fighting the demon dog.
But somewhere deep in her mind she hears a tiny voice, help Lin, touch him and help him. She moves forward and entwines her fingers with his. He is about to ask what she is doing when he feels it—an amazing reservoir of untouched spiritual power. Mai, he realised with a jolt. He feels a thin river of energy trying to merge with his. He lets it in.
Naru stands at a corner and watches Lin and Mai. He can guess what is happening even though he cannot see the shikis. He had fathomed as such when Lin aired his doubts about Mai to him.
Together, Mai and Lin, channel their energies and the familiar's and jump on the demon dog with full force. It doesn't take long before Shiroshiki and the wolf hack at the dog. With one long, loud growl, the demon dog dissolves—its thirst for blood unquenched. Mai and Lin's combined forces dispels it with considerable ease.
When Nagisa sees her summoned demon getting defeated, she shouts, "Nanami!"
"Nagisa."
Lin stops. Naru, too, turns his attention towards Mai. From the corner of his eyes he sees Houshou re-entering the room. Something in her voice surprised them. It did not sound like her at all.
Even Nagisa stops. She looks confused. Mai looks like herself but not like herself. Her face softens and her eyes get melancholy. Her posture changes. She straightens her back and looks directly at Nagisa. She says, "Nagisa, my little sparrow." A single tear rolls down her eye.
Naru whispers when he figures it out, "Nanami has possessed her."
Then something happens to Nagisa as well. Her form shifts like static. She grabs her head and screams, except there is no sound. Just her mouth wide open. She closes her mouth and everybody is surprised to see tears in her eyes. She whimpers, "Nee-chan?"
Mai smiles sweetly and raises her arms beckoning Nagisa to come closer. Nagisa moves towards her. Lin is about to move when Naru holds him back. He doesn't say anything as he glares at Naru.
"Nee-chan?"
"Nagi-chan…I am so sorry," Mai says.
"Nee-chan, I am sorry," more tears roll down her face.
"It is all my fault isn't it? I should have done something."
"You didn't know?"
"Know what?"
"Saito and Kenji made a bet on me, how fast Kenji can seduce me."
"What?" Mai raises her sleeve and covers her mouth. Her eyes wide in indignation.
"You didn't know…" when Mai shakes her head, Nagisa scowls, "Yet…you carried Saito's child, didn't you?"
Mai cries, "Nagi! Please forgive me!"
"NO!" her forms shifts again. It is back to the previous Nagisa. She screams, "I WILL KILL YOU!"
"Nagisa no!"
But before she can jump on Mai, her flight stops midway. She looks down to see a blade sticking out of her midriff.
Lin and Naru saw the change in Nagisa and before they could do anything, Houshou rushed by them, chanting. Then he drove the sword through Nagisa. Then the three of them watch in awe as a white wisp floats out of Nagisa's body. Then they see the spirit leave Mai's body. Lin rushes over as Mai falls sideways. The wisp takes a solid form: it is Nagisa. But a different one. Her face is relaxed and she smiles at the spirit of her step-sister, who smiles back. The two step-siblings clasp their hands together. A bright light suffuses them and when the light recedes, they are gone.
"Phew," Houshou wipes his forehead. It is over. Their ordeal of eight days is over.
The air gets back to normal. Mai wakes up to find herself bunched up in Lin's arms. She asks, "Uh, what happened?"
Lin simply sighs.

It was near nine and Lin, Mai, Houshou, Ayako, Naru and John are at the looks squarely at Houshou, "Explain."
He rubs his neck, "Okay. When we were talking about onryos and such, I remembered a story my father had told us once. A tale from Izumo, it is called Of a Promise Broken. It is about a samurai who promises his wife that he will never remarry if she died. She dies and surprise, surprise, dude goes and remarries. His wife returns as an onryo. As usual, she killed the new bride. But she was defeated by a samurai blade while a Buddhist prayer was chanted."
"Why didn't you tell us all this before?" John asks, holding the ice pack to his head.
"Because one, it is a tale told to spook little kids. Two, there were chances it would never work. But apparently this legend turned out to be true."
"Lin says I got possessed by Nanami and that something happened to Nagisa," Mai comments.
"Yeah," Houshou says, "I think Nanami came down to help her sister."
"When Takigawa drove the blade through her I think her other self finally released herself from her onryo self," Lin says.
Naru nods, "She is finally gone."
"The real one is finally at peace too," Mai smiles, rest in peace, Nagisa. Then she turns her attention towards Ayako. She asks, "Are you okay?"
Ayako smiles, "Yeah it is a little bump."
"Is the…uh… I suppose you cannot tell," Mai blushes, biting her cheek scolding herself for almost giving Ayako's secret up.
Ayako blushes, "Uh, yeah. Haha."
Houshou crosses his arms, "Excuse me? I feel like I missed something. Care to explain?"
"Your wife is pregnant," Naru solemnly announces.
"Wha—" Houshou flails.
"How?" Mai gasps.
"Naru," Lin sighs.
"A baby?" John can only ask.
"I will kill you Naru," Ayako promises.
"It was obvious. You puked nearly every day. You even refused to drink alcohol when Sakura offered you sake two days ago. We all know how much you love your drink. And I heard you asking Sakura about pregnancy," Naru explains.
Ayako slaps her forehead, "I will really kill you."
"A father? Me?" Houshou finally realises. He cannot really believe this is happening to him for real.
"That is so cool!" John exclaims. Then Mai has to chew the skin around her thumb and pray for invisibility and Lin had to look at the ceiling as John says, "SPR's first baby!"
Needless to say, Naru laughs the loudest much to Lin's great discomfort.
Thankfully Lin's phone rings to stop him from hitting Naru. He picks up, it is Yasu. He says, "Yes?"
"Masako woke up! And so did Kaito Kawaguchi!" Yasu informs. Kawaguchi and Masako were at the same hospital.
Lin disconnects the call and relays, "Masako is awake and Kaito Kawaguchi came out of his coma."
They hear a discreet knock on the door. It opens to reveal Tsugumi. She smiles, "Kaito-chan woke up!"
Naru gets to his feet. He says, "We heard. So did our colleague."
"God, it is finally over," she grabs Naru's hand, "Thank you Shibuya-san!"
Naru nods. He says after Tsugumi leaves. "Let's go."