Harry Potter in Time but He's a Stoner

Don't let Harry shop by himself.

Harry nodded and left with his bank card and decided that now he had unlimited money and no adults to watch him and no people who recognised him, he could finally do as he wished and piss about in public without being scrutinised. So, like any other teenage boy, he decided to get a pet. He made his way to the The Magical Menagerie, the only place he was sure he could get a pet without it being cursed, dead or a human in animagus form. 

He walked through the doors to see an attractive boy, about Harry's age - maybe a bit older - working the till. But Harry didn't get to look at him for long as he felt a tug in his chest that tore him away from the entrance and to a sign that said 'DO NOT PET, IT WILL BITE' which definately did not unnerve Harry at all - at all (sarcasm). So, Harry being Harry, he looked behind the sign and felt something spark inside him. It was a black mamba. And it was beautiful. Harry forgot he could speak parseltongue and stared in shock as the snake wound it's head up until it's neck was stretched up, as if it was sizing him up and looking down at him at the same time. 

"Your gorgeous," Harry mumered in parsletongue, not even realising he had switched. "What's your name?" 

"I do not have a name." she hissed at him - he deducted she was a girl from the slightly high accent in her voice and the dominance she wasn't afraid to show to the man in power. 

"Then I shall name you..." He pondered for a moment, "Katya, your name is Katya. It means pure in Russian."

"Thank you, I will treasure it." 

"Is there a problem?" The boy from the counter had wondered over, staring at Harry in pure shock at his daringness. 

"No thank you, but how much for her?" Harry pointed at the snake and the cashier shook his head fast enough Harry thought he'd get whiplash. 

"She's not for sale..." he paused for a second, "actually, she was going to be sent to the USA for examining but I will give you her for free if you can hold her."

Harry nodded and turned back to Katya. "Am I allowed to hold you? I think you're my familiar." 

"It would be in my honor to let you hold me." 

After the conformation Harry unfastened the top of the viv and stuck his arm into the tank. The cashier boy's smirk slowly fell into dread as he watched Harry first, talk in parseltongue and second, go to hold a black mamba. Katya sowly made her way up Harry's arm until she was at the side of his face and nuzzled her nose with Harry's cheek, before settling into a soft sleep, or dormant nap state, on his shoulders.

"Can I take her now?" The cashier just nodded his mouth wide open and Harry made his way out of the door. He could pick up things for her later, now he was just excited to have a new friend/familiar and to try the famous chocolate frogs of this era. Apparently, from Fred and George, the chocolate frogs were made with a different kind of cocoa bean making them taste better.