Nothing for the moment. Inside the lamp, on the other hand...

Touma entered his apartment with a sigh, putting his things down for now. He looked at the lamp curiously. It felt and looked like real gold. Not that he could tell for sure, mind you. "...maybe my luck is taking a turn for the better?" he wondered, before beginning to rub a dirt splotch off of it with his wrist. He had no idea how correct he was.

The lamp suddenly shuddered, and released a large, sparkling cloud of silver smoke, making him yelp and drop it. "What the hell!?" he demanded, wondering if it was booby trapped somehow. That WOULD be just his luck...

Instead however, the smoke coalesced into the top half of Index, wearing silvery silk over her breasts, translucent enough that her A, almost B-cups weren't hidden in the slightest. She also wore a veil of the same material over her face. Furthermore, she wore several pieces of jewelry, like armbands attached to detached silk sleeves, a gold collar, and a tiara.

Her lower half was made of the shimmering mist, in the shape of a tail she floated on. "...Index?" he asked, wondering just what she had been doing in that Lamp... If he didn't know better, he would assume she was some kind of genie.

"...why, hello, Master~!" she chimed, gazing at him with doe eyes. "I am the Sex Genie of the Lamp now! Nice to meet you again!"

"Uh, what, Sex Genie?" he asked, taken completely aback. "I'm sorry, but, what exactly happened? ...and why is my arm not negating your magic?" he asked.

She smiled cutely, placing an index finger on her lower lip, and replied, "Well, Master, this Lamp isn't exactly of this world. Doesn't quite follow the same rules of magic as the magic of ours," she explained. "...as for how I got inside it, well..."

(Side note, couldn't find a good image for an aged up Index, sorry. I just made a note that her breasts were a bit bigger, and will leave the rest to your imagination, but she is intended to be 18.)