Harry's world turned white, his mind unable to process the sensation beyond 'too much'.
When color and shadow returned, there was an ache of emptiness in his groin that he'd never felt before, and an intense feeling of satisfaction which filled not the emptiness, but the remainder of Harry's body.
Only after processing those two sensations did Harry realize he was laying, quite nude, on a stone floor in a cool room.
The only spot on him that was warm, in fact, were the front middle of his thighs.
Harry blinked his eyes into focus, then turned them down his body.
Straddling his legs, just as nude as she had been before, was the succubus, now grinning confidently, "Enjoy that, Master? I'm hardly the first that sucked a virgin unconscious, but I think my time might be close to a new record for that, at least."
Harry grunted, unable to find words to reply. Already, though, the nubile form on his legs, the knowledge, the memory, of what she'd just done, coursed through him, causing blood to flow once more 'southward', and the emptiness to begin to recede.
"Mm, didn't think that'd satisfy you, though," the creature grinned as his penis twitched then began to swell before her, "and you do owe me two more doses... but it's time for your virginity to be a past-tense thing. Up you get, Master."
Then her wings fluttered into motion, passing within a second to a nearly-invisible haze not unlike a hummingbird's wings, before she lifted straight up off him, giving his turgid member a single pat with her left hand as she did so.
She landed a few feet away, then offered a too-small hand to help Harry to his feet.
He took it reluctantly, and yelped with surprise as she hauled him, apparently without effort, upright with just one hand.
"Looks can be deceiving, Master," she smirked once more, "I told you I was an adult. Now... your blonde memories suggested a study group in the library. What time does that close on a weekend?"
Harry blinked once, "Er, ten, I think. It's..."
"Nearly two, you were unconscious for over an hour," she said, grinning again, "But that's not a problem. I'm going to assume there's basic protection against fornication. No going into girl's dorms, things like that. Right?"
Harry, having had some experience with that, nodded once.
Unperturbed, the succubus wrapped a hand around his dick and started walking, literally tugging him along. "Come on, then. Get covered, unless you fancy being spotted walking around the halls like that."
While he complied leaving his clothes but throwing his father's cloak around his shoulders, Harry paused, looking up at his servant- though so far she'd been pretty bossy, he realized, almost like Hermione- "What about your clothes? And your hair. No one in the school has pink hair."
"Lesson... meh, whatever. Lesson. We call it... Invisibility. Really," she smirked at his wide-eyed expression, "It's got a more flowery name. Incubi can't use it, only Succubi - they have other powers, as do we, the other gender can't use - but I like the simple one."
Harry nodded, familiar with the idea. He, after all, owned a rather good Invisibility Cloak left to him by his father.
One I should've brought with me, he thought to himself as he slipped on his shoes and put his hand on the Room's door.
This time, even as she faded into nothing as far as his eyes were concerned, the creature wrapped her child-like hand in his and stepped out into the hallway, pulling him along. "Alright, Master, lead the way - to the Library first. If she's not there, we can keep looking."
While they walked, Harry was struck by something for the second time. "Well... if you don't want me to know your name, what should I call you?"
He felt, more than heard, the nude creature shrug by the pull on his left arm. "Whatever you want, Master. I'm your servant, remember?"
That being said, the names he whispered one after the other as they walked down the moon-lit halls, carefully avoiding the soft patter of a patrolling Professor Sinistra's slippers, were shot down one by one.
Until, that is, just outside the library itself. "Lilith," he tried, remembering an old, old Christian tale.
She froze mid-step for a half a heartbeat, then he felt his arm tugged down. A moment later, soft lips ghosted across his cheek in a kiss that left Harry's whole body tingling with renewed, almost desperate arousal. "The name - so legend has it - of the progenitor of our species. That works."
"Lilith it is, then," Harry found himself saying dumbly, while a part of him wondered if this was what it was like for normal people - people not him - to be around veela.
When the door opened quietly into the silver-lit Library, the faintest of snores could be heard from off in the stacks.
"Bingo," Lilith's voice came, "There's your little snake-girl. I figured she was the type. Go get her, tiger. I'll be here to back you up. Before you wake her, give me a few seconds to- spread the love."
Harry watched, full of apprehension and growing arousal. Truth be told, Harry was quite used to just a few minutes - he suspected, though he'd never timed himself, to average about five - of refraction time. The sheer oddity of the situation, however, no matter how much he'd hoped, dreamed, or even planned for such an occurrence, was the only reason he could think of for not having a raging hard-on for the entire time Lilith had been present.
Because, as he watched the Succubus' rear flex as she walked, apparently unnoticed by the sleeping girl, across the main reading area of the school's library, he was quite aroused by the demoness' form, no matter how much he was loath to admit it.
The fact that there was another object of his affect- well, lust- just a few feet beyond her, sleeping, vulnerable...