Also based on the idea that in the original Sherlock series he liked smoked crack or whatever because at the time they were just starting to realize how unhealthy it is so this is the 21st century equivalent with caffeine and John is pre-med and rightly horrified.

John laughed derisively at the exhausted student that collapsed into the chair beside him seconds before his 7am microbiology class began, nearly spilling the venti Starbucks coffee he carried. Bags under his eyes colored lilac made the man look more like a crack addiction and less like a college student. His attention was pulled From the happenings beside him and toward the front of the room as the lecture began. A staccato pop and subsequent fizzle of a monster energy drink snapped Johns eyes to the mess beside him who chugged half the coffee in his cup and then turned to directly face the watching eyes beside him to say, "I'm going to die," as he proceed to pour the carbonated sugar water into the remains of the Starbucks cup, then, still maintaining eye contact with the horrified man before him, drank the entirety of the concoction in one go.

An expression much resembling that of The Scream displayed itself on Johns face, half disgusted half enthralled.

The other only smiled devilishly and offered a hand.

"Sherlock Holmes."

John blinked out of his state of shock.

"Uh, yes- John Watson."

He accepted the hand and still slightly dazed turned back to the lecture in the front. 40 minutes later John caught himself suddenly waking up from a daydream as the class around him rumbled to life, zipping up bag and pushing in chairs.

"Shit."

"You alright?" Sherlock asked.

"Zoned out for the whole lecture. Didn't get anything he said."

Sherlock riffled through his stack of papers.

"Here." He handed a set of papers to John. Four pages of detailed notes with diagrams and explanations.

"Oh I can't-"

"Take them. I'm not going to need them anyway. I'm not enrolled in this class."

"You're not- what?"

"I'm a criminal psychology major. Sometimes I sit in on other classes when I'm bored."

John gave no response, still processing.

"Don't tell though. Technically illegal since I haven't paid for the course." He winked and pulled the zipper of this carrier closed.

Johns mouth finally caught up with his brain as Sherlock shoves his chair in and began to walk away.

"Wait!"

Sherlock turned at the sudden exclamation.

"I-uh, thank you for," he gestured to the stack of notes.

Sherlock nodded, lips pressed together, and pivoted on his toe to once agin head to the exit.

"Hey uh, you probably shouldn't drink that stuff, it's terrible for you." John continued.

A satisfied grin filled Sherlock's face as he considered the advice.

"Maybe you could show me some better coffee sometime. You have any other classes today?"

"No I haven't. You?" John replied, hopeful.

"None at all." Sherlock rested his weight against the desk behind himself.

"Have you been to the Bakers street coffee shop? The have the most delicious biscuits." John offered.

"Haven't heard of it. You'll have to show me."

"Well I'm not doing anything right now if you'd like."

"That sounds wonderful, though I doubt I'll be needing anymore coffee."

John laughed heartily. "As a future doctor, I'd say that's a good call."

•••

"So if you didn't have any classes today why the caffeine death drink at 7 am?"