Amu was invited to er,a very special lesson on well, how to become an adult.

It was just a month after Amu and Ikuto had officially become a couple when Rima had grabbed Amu's wrist tightly and said in a very creepy voice, "We need to talk!"

Although Amu already knew that Yaya and Kairi were spending some time together during winter break, she had never expected this to come up.

"Are you serious?" Amu said blushing furiously. "Yaya has become an adult!?" They were all in high school and she supposed, desperately trying to seem a little older but this had never been a problem with Yaya.

"I can kinda see it though," Rima said slowly.

"Don't picture it!"

"Well, we should know about it...and you know, it's a good opportunity."

"Well..." Amu said still blushing but for a different reason.

The two of them were on their way to Yaya's house to be given a introductory lesson. It was apparently Utau's smart idea.

Utau was already seated comfortably on the chair when they arrived in Yaya's living room. Yaya was nowhere to be seen.

"Where is she?" Rima questioned.

"In the living room getting us drinks," Utau said casually.

"Oh you guys are here!" Yaya said smiling with a tray of orange juice. She set it on the coffee table and sat herself in a large comfy chair.

"So you guys want to know what happened huh? Yaya wonders if it's really appropriate to just talk about it," Yaya said with a small frown.

"It's fine!"

"Well actually Yaya didn't want to do it, you know, Yaya wanted to wait a bit but Kairi pressured me to do it," Yaya said looking up at the ceiling. "Now that it's over, and Yaya realized it was probably for the best."

Amu and Rima exchanged scared looks and nodded for Yaya to continue.

"Well let's see...it didn't hurt at the moment but after a second it hurt a lot. We must have done something wrong but at first it didn't work," Yaya said biting her lips, "Yaya doesn't think he put it in correctly,"

Amu and Rima were blushing like crazy and Utau gave a blank expression. Amu never thought Kairi was like that.

"It was absolutely terrifying," Yaya said with a shiver. "Yaya almost cried but when Yaya looked at Kairi's face, Yaya realized Yaya probably shouldn't. Because it was okay as long as Yaya is with Kukai," Yaya gave a grin.

They say that once a girl becomes a woman, they radiate womanhood. For some reason, Yaya seemed to have the opposite affect and she looked and sounded like a child than ever.

"Well anyways, he just hugged Yay a lot afterwards and it got loads better," Yaya said.

"I guess you would do it again, huh?" Amu said in a tiny whisper. Rima had eyes of fascination.

"Noooooooo. Yaya would never do it again!" Yaya protested.

"Still a child?" Amu heard Rima mutter.

"Haha. Well, Yaya you look younger than ever," Amu smiled. Yaya grinned.

"Kairi said that too. That my cheeks are like a chipmunk." They was an accurate description actually. Were they always like that?

"Anyways, Yaya recommends you to get your wisdom tooth pulled quickly!"

There was silence.

Oh, Yaya.