They stayed like that for a long time. Or at least it felt that way to Harry. He was too busy feeling loved and protected and all those new things to count seconds. Until he discovered something rather astonishing, something all other suburban white kids already knew: You can get bored of feeling loved and protected. So Harry let go and leaned back, as far as he could still wrapped up in snake.

He was somewhat conflicted about the recent chain of events. While a deep, emotional moment was certainly appreciated, and long overdue, it would have been nice to have it with another human. Or at least humanoid, he wasn't a speciesist (mainly because he wasn't really sure what that actually meant, the hailstorm of heavy words had left nothing beyond the knowledge that Hermione disapproved and that it had to do with human-shaped not-really-humans). But when it came down to it, he really couldn't afford to be picky. but it was still a bit awkward.

"I sort of expected to be eaten."
"I can ssstill do that."
"Hmm, that would be one hell of a way to die. But for now, I'll pass. By the way, I'm sorry if I came on too strong. You are rather adorable, somehow. Though that might be the concussion speaking."
"And you looked rather moronic, I'm certainly glad you have an excussse."

Harry blinked. It had a point though. Being so distracted that a fifty feet snake could sneak up on him was a sign of brain malfunction, hopefully only temporary. Come to think of it...
"Could you unwrap yourself? I think I should sit down."
It - he really should ask for a gender, and name- did so with commendable speed.

Too much, really. Harry almost planted his face into the ground. But he caught himself, and after a bit of stumbling, he managed to touch down with the right body part. Hopefully the snake wouldn't mind being repurposed as a chair.
Then he spent the next few minutes in a battle to keep his meal down. Now, at last, he had a reason to thank Hermione, because dinner had already lost most of his fighting spirit, and he still barely managed. With support from breakfast, they would have already escaped. And throwing up on his current host, well, there were better ways to commit suicide. Intentional, for one. And if he was going to take his host up on its gracious offer, he'd make sure to season himself beforehand. He liked to think of himself as a professional (he cooked for a living, even if it wasn't by choice), and with that came a certain pride and the desire to do things properly.

"Are you're eyess sssupposssed to point in different directionsss?"

Harry cursed himself. He'd let his attentions slip, again! How incredibly rude. It would take at least five cups of tea with chumpits to repair the damage to his britishness! And apparently he couldn't focus on his host even if he wanted to. But TV came to the rescue. Hah, Dudley would be so pleased when he heard that.

"Could you slap me? I think that's the proper medical procedure."
And, being a surprisingly polite serpent person, it obliged immediately.
"Well, hisss eyesss are ok again. Now he jusst hass to wake up. Humanss are ssso fragile.

"Maybe I ssshould jusst eat him."

On awakening, the day's trend of unexpected happenings continued. And this might well be the most unexpected: For the first time, Harry Potter understood Vernon Dursley. His colorful, if inept, descriptions the morning after a particularly long night out matched Harry's feelings rather well. Of course, the company of a massive, possibly hungry snake with an intense stare was preferable to the company of a massive, definitely hungry pig and the intense voice of its mother.

He didn't remember being quite so damp, though. Or so cold. He made a mental note to lose consciousness in warmer places in the future. From the pattern in recent events, it would make for a happier life.

"Oh, you're awake again. I put you sssomewhere more comfortable, but thisss place issn't really prepared for guessstss."
Hmm, that explained the dampness. A snake wouldn't have many options to move a person. And maybe it wanted to know what it was missing out on. He took his continued existence as a good sign. Now, he wouldn't have to shower with hot sauce on the off-chance he committed unintentional suicide.

Harry examined that thought for a few seconds, then decided to get his head checked when (if) he returned to the castle. For now, he had a bigger issue looming over him. Especially since the issue might get impatient waiting.

"Uhmm, sorry to impose on you, but can you tell me if there's another exit? Or give me a hand with that tunnel to the girls bathroom. I don't think I could get up there on my own otherwise."
"No." Harry was a bit concerned about his future for a few moments, before an enormous and enormously satisfied smile blossomed on the snake's face. "I don't have any handsss to give, but I can help you up to the bathroom."

Harry wondered if it had a really lame sense of humor or if it was just really literal. He decided it wouldn't matter for now, simply nodded, stood up, wobbled and sat down again. It was clear he wouldn't be going anywhere.
"I can't give you any legsss either, but I can give you a ride." So it had a lame sense of humor. Well, he was the last with any right to complain.
"In your mouth?" He asked hopefully, that is, hoping for a no.

And, to his great relief, that's what he got. Though the reason was somewhat insulting. He did not taste horrible. He swore then and there to return and show the snake the wide window of terrible tastes a talented cook could create. And he had become quite talented, cooking for the Dursley and their twisted preferences. He was so glad Hogwarts had put an end to his voluntary diet.

The light a the end of the tunnel tore him out of his musings on shades of taste between cooked lard and boiled lard. He slid of his temporary transport, and caught the floor before it could reach his face. Then he slowly got up, and turned to the patiently waiting snake.
"Thanks for the ride. Mind if I visit once I'm not concussed out of my mind?"
"No, that would be amussing."
Huh, apparently snakes could snigger.
"So, what about the missing sink?"
"Just tell it to clossse. Ssame for opening it. Though you'll have to be a bit forceful, with your accent."

Harry wasn't sure what it meant with that, but didn't want to wait even longer before taking care of his head either. It had begun to ache pretty fiercely.
So he simply nodded, said goodbye and after a short wait, commanded the sink to return.

Faint laughter drifted through the still open hole.

He sighed. This would take a while.

Omake:

"Sso you think I'm not giant."
Harry looked sheepish for a moment, then remembered that he was talking to a giant snake and tried to look embarrassed instead.
"Sorry, but Dudley said-"
"Tokyo, ssso I heard. Well, watch thiss."

With that, it pulled out a cardboard replica of Tokyo (luckily there was a large sign that said so, Harry wouldn't have recognised it otherwise), and started to hurl some rather vicious insults.
Harry watched for a few minutes, impressed by its creativity, before he felt that he'd been silent for too long.

"You know that's not what he meant."
It looked up, and nodded.
"Yess, but your mind'ss sso twisssted, I don't think you'll care."
And Harry couldn't disagree.