Guess who of all people strode in.

Kawahira strode in, a bemused expression on his face as he took in all of the people's horrified/mind-blown faces and chuckled.

A teenager, about 14, bounded right behind him, holding a sharp looking Katana, smile dropping as he saw so many people around Rin, and most of them MALE.

Rin looked delighted, but expression turned rather puzzled as she looked around.

"Guys? You recognise Jiji-san?"

Tsuna turned, and stared at Rin.

"Your Jiji?" Tsuna shrieked, immediately covering his face with his hands.

"Voooi. You sure his your Jiji?" Squalo whispered, still in shock.

"Yes? That's my younger brother, Ren." Rin pointed to the 14 year old that had rushed to Rin and glomped her.

"You're lucky the Arcobaleno are not here." Xanxus growled, glaring at the man who had caused so much trouble to them during the Arcobaleno Trials.

Kawahira merely smirked and chuckled lightly, instead making his way to Rin's grandmother, bowing to her.

"Hello. You're done with the basics with Ren?" Rei asked, her severe expression turning a little soft.

"Yep. How's my granddaughter Rin? You have not been treating her badly, I suppose." Kawahira turned to the Vongola and Varia.

"Mn! You people better have not treated my Nee-chan badly!" Ren waved his Katana threateningly.

Recovering from their state of shock, the Vongola, but mostly, the Varia, was jerked into another state of shock when Rin started to say something.

"Obaa-san, Jiji-san, Kyouya-chan there is my boyfriend!" Rin said cheerfully, and now Kawahira dropped his chopsticks from his ramen bowl.

Kawahira eyed Hibari, and laughed.

"One of the Vongola huh? Rin, you're growing up."

Rei took out her own katana, and pointed it at Hibari's neck, only to be met by a tonfa.

"Hn. This guy can fight... Good, good." Rei smiled to herself, and nodded approvingly.

Only Ren didn't take the news.

"W-what? Nee-chan! You can't be this guy's girlfriend!" Ren whined, slashing the air with his katana.

"Yes, she can." Hibari growled as he took out a tonfa.

Rin just smiled condescendingly as an all out battle erupted when the Varia and Ren decided that Rin was their member/ Nee-chan and should not be with the Vongola brat against Hibari and a sad, sad vongola that was dragged into battle.

Oh well. That's boys for you.