Vena.

The Latin for veins. Within the body, there is an approximate length of sixty thousand miles of veins, arteries and capillaries alike, all manoeuvring their way around the complex contraption that is the human body. Veins carry deoxygenated blood from the tissues back to the heart, the gluttonous liquid becoming even more enticing as the heart oxygenates five litres of the addictive substance.

The blood that flows through the veins is such a capricious material to some rare beings this crimson liquid is the giver of life, its nutrients rejuvenating the once starving being and replenishing their insatiable appetite, even if just for the briefest of moments. But then the scarlet liquid can have the opposite effects. Instead of filling the person with the warmth of satisfaction as it glides down their throat it engulfs their entire being with a burning need for more.

And the more they had?

The more they craved it and the more it consumed them.

The small classroom was quiet only two students remained in the darkened room as the sun cast ever blackening shadows through the paned window; time had passed so quickly that the pair had no recollection of how long they had been there.

"Thisisn't going in Zero, no matter how many times I read it or say it aloud it just won't go in!" Madoka sighed in irritation, leaning her head on the polished wood of the desk; Zero glanced over from across the table, his lavender orbs watching the forest eyed girl with slight amusement. He paused from his note taking and leaned back in his chair ignoring the familiar burn at the back of his throat beginning to agitate him as her blonde her parted like curtains, tantalising revealing her slender neck.

"You need to visualise the information that you're trying to remember Madoka." Zero murmured running a hand through his own pale locks, they simply falling back to their previous place. Madoka glanced up from the grain of the wood to meet his floral orbs her own filled with both exasperation and slight jealousy for his aptitude for academics. Sluggishly she slid up to an upright position briefly casting her eyes to the lush greenery that stood beyond her reach on the other side of the window.

"Alright then, how do you suggest I do that? Because as of now I am out of ideas how to 'visualise the information'." Madoka murmured softly picking up her pen and continuing with the doodle that inhabited the margin of her paper. Zero's eyes glided up the skin of her wrist, the pallid blue tinge of her veins faintly protruding from beneath her alabaster pallor: then an idea struck.

Wordlessly Zero withdrew from his seating and opted for the seat beside her, a marker now present in his hand; Madoka quirked a brow in curiosity watching as he gently rolled up the sleeve of her cardigan.

"The veins of the arm carry blood from the extremities of the limb, as well as drain the arm itself. The two main veins are the basilic and the cephalic veins. There is a connecting vein between the two, the median cubital vein, which passes through the cubital fossa and is clinically important for drawing blood." Zero susurrated lowly as if he had read the passage from a textbook and not from memory; Madoka watched in awe as he began to trace the veins upon her skin with the marker, miniscule rivers of ink appearing where her skin hungrily absorbed the ink.

Zero paused the pen at the crease of her forearm glancing up from her arm to her eyes. "Visualise that." He muttered, the slightest of smirks shadowing his lips; Madoka smiled, a light giggle passing her rosy lips as she held up her arm and admired his inky handiwork.

"What about the rest of the diagram? Help me visualise that?" Madoka smiled widely, her emerald orbs twinkling with a vivacious new lease of life and drive; Zero's lips twisted upwardly into the remnants of a smile as he began a new line for her envisage.

She simply failed to visualise it was permanent marker.