The forest

The war has finally began, the guardians have the advantage, the Nero family were weaker than they thought, or maybe not. Mukuro avoids fighting, he runs to an unknown place.

"Strange, I can feel a phenomenon power under my feet." He said. "Maybe I need to follow it."

Tsuna beats his enemies without any problem, but a strange man comes to him, with a scary smile. "So, you're Vongola decimo, I thought you were more than this." Without any move, Tsuna could feel pain in all his body. "You are so weak."

"What… was… that…?" Tsuna said in pain. "How… did… you…?"

"You are fighting enemies who are stronger than you." The man said. "It's a big mistake, Vongola Decimo, Tsunayoshi Sawada." Tsuna didn't give up, he stands up and sends to him his X-Burner, but, even his powerful attack didn't affect the man. "I've told you, I am stronger than you, and you will always remember the boss who beat you." Tsuna finally falls, without any power to move a muscle. "I'm going to see your friends." And the man disappears.

The same thing to Gokudera, he was like a statue, against a beautiful blonde woman. "What did you do to me?"

"Hmm… Nothing at all." She smirked. "I've just froze you with my beauty."

"What…?" Gokudera changed to a stone statue without knowing what happened to him.

Ryohei's arm was broken by another member, without moving a finger, he tries to attack him with his cambio forma, the man puts a finger on him, and the sun guardian falls.

"Senpai!" Yamamoto attacks with his most powerful attack. "Scontro di rondine!"

"This is a powerful attack, but, you can't kill me with this."

The man disappears, then appears behind Yamamoto and beats him.

Even the strongest guardian was in danger, he was fighting an enemy faster than him. "Stop running around, I will bite you to death."

"You can't bite to death." He said. "'Cause you can't see me, cloud guardian." He was hitting Hibari too easily thanks to his speed, even his tonfas were broken. "I don't believe that you are the strongest guardian, or maybe, you're not the real strongest guardian."

"What do you mean?" He gives him an ice look.

"Well, what about, Mukuro Rokudo?"

"I am the stronger! Not him!"

"But I heard that, he defeated you without any problem, he didn't even show the full of his power, because you are weaker than him."

"Shut up!"

Hibari runs to him. "You left me no choice." Hibari finally falls.

"What the…?"

"This is our power, cloud man."

Vongola castle

"What? The Nero family is taking the advantage of the war, and the guardians are…"

"We only haves Mukuro and Chrome." Says Reborn.

"This is bad, kora!" Colonello says. "We have to help them!"

"It is impossible for us?" The ninth said. "Even after training them…"

The forest

Chrome was trying to find the others, but the boss appears in front of her. "Chrome Dokuro?" She takes her trident and ready to defend herself.

"Do you think you will fight me with this?"

"Eh?"

She froze without knowing why, she couldn't move a muscle.

"What's happening?"

"Prepare yourself to die." He sends a strong light with sky flames to her, she couldn't move a finger. "This is the end."

She closes her eye to see her master's face in her mind. "I'm sorry, Mukuro-sama, I can't survive…" After few seconds, she didn't feel any pain, she opens her eye to see him, in front of her, protecting her. "MUKURO-SAMA!"

"So, you are the real mist guardian."

"It makes me mad, if someone touches the precious things to me."

"Precious?" The boss laughed. "You call that weak girl precious? Stop joking."

"If I was you, I wouldn't laugh."

"What do you mean?"

"I have your precious crystal." Mukuro takes a crystal in his hand, which makes the boss's eyes widen in anger.

"How did you?"

"This crystal gives you and the others a phenomenon power, I just follow this power and found that crystal. I wonder what will happens if I broke it." Mukuro broke the crystal, causing the boss to become weaker. "The war is over." The boss runaway with his family.

And finally, Mukuro falls, Chrome runs to her master with her teary eye. "N… Nagi… stop crying, I don't want to see your tears."

"But…!" Mukuro put his finger on her lips causing her to stop talking, and then he put it on her cheek.

"I don't want to see you crying…" Suddenly, he could feel the pain in his whole body."Sorry, I have not kept my promise."

"Don't say that Mukuro-sama! You will survive! You can't die!"

"My… End… Is… Coming."

"No, I, I will not let you die!" She was crying harder and harder.

"I… need to tell you something… Chrome… No… Nagi."

"Mukuro-sama! Your body is too cold! You can't die now!" She says as she takes his hand.

"I… always..." Then, he died before his sentence ends, he died with a smile on his face.

"No!"

The forest was about to explose, she didn't want to leave him, but the members of her family take her away from her master. Before the explosion, Nosaru comes to her dead son.

"Sorry, but I can't let you die." Nosaru put her hand on his hair and caress it. "I will save you, with my powers." A golden light appears. "But you will lose your memories."

Vongola castle

"I've never thought that Mukuro will save us." Tsuna said with teary eyes.

"I regret all what I said to him, tenth."

"He was strong to the end! HE IS A GREAT MAN TO THE EXTREME!" Anime tears on Ryohei's eyes.

"I think we were wrong about him." Yamamoto says.

All the guardians were sad about Mukuro's death, especially Chrome, he died because he was trying to protect her. But Hibari was the only happy guardian, after all, he hates Mukuro.

The war ended, and everyone comeback to Japan.