The Box of Ultimate Bliss holds nothing but fear and destruction

Karin held out her arm and brought it to Naruto Uzumaki's mouth.

"You just killed so many Grass Ninja. That must have cost you a lot of strength and Chakra, right?"

"Go ahead and try it."

For some reason, Naruto Uzumaki felt there was something strange about the look in Karin's eyes.

Still,

she had gone this far, so he might as well play along.

Besides,

he wanted to find out how Karin's Constitution worked.

With that thought,

Naruto Uzumaki bit down on Karin's arm. She immediately cried out.

At the sound, the corner of Naruto Uzumaki's mouth twitched.

Karin really was a Lustful Woman.

There was no way she had made that sound because it hurt, was there?

But

Naruto Uzumaki's attention was soon drawn to the pure Vitality surging into his body.

"So that's it... Karin heals injuries by transferring her Vitality to other people!"

Naruto Uzumaki released her arm, understanding at last.

In some ways, Karin's Vitality was almost absurdly abundant.

"It's just as you said."

"Looks like you do have some use after all."

Naruto Uzumaki nodded as though weighing her worth, then tossed aside the Grass Ninja Forehead Protector on Karin's head.

"From now on, you're a Konoha Ninja."

"Come with me."

With that, Naruto Uzumaki turned and headed out of the Dungeon.

Blushing, Karin pushed up her glasses. A faint smile appeared on her lips as she looked at the bite mark on her arm.

This is wonderful.

The first Mark left on my body was from Naruto-kun!

Karin stole a careful glance at Naruto Uzumaki. When she was sure he wasn't looking, she raised the spot he had bitten to her nose and sniffed it. She pursed her lips and swallowed without meaning to.

The next moment,

Karin pressed her arm to her