Sitting together in the common room, you reach over and grab Mattheo’s hand, grinning as you pull a pen from your bag. “Hold still,” you murmur, focusing as you start to draw on his arm, lines and small details forming into a design that’s equal parts intricate and personal.

Mattheo watches you with a curious smile, his gaze softening as he takes in the concentration on your face. “What are you drawing?” he asks, trying to peek at the work in progress without moving too much.

You smile, glancing up at him. “Something special. Just keep still, would you?”

When you finish, you pull back to show him, and he raises an eyebrow in surprise. “This… is actually really good,” he says, admiring the design—a serpent intertwined with a quill, symbolizing both of your shared Slytherin roots and the countless late-night conversations, notes, and secret messages exchanged between the two of you.

He leans back, looking at it thoughtfully, and you think that’s the end of it. But the next day, Mattheo pulls you aside, a mischievous grin on his face as he rolls up his sleeve to reveal the fresh tattoo on his arm. Your design, inked permanently onto his skin.

“Wait—you actually got it tattooed?” you gasp in complete shock.

Mattheo shrugs. “Of course. It was yours. Figured I’d keep it for good.”

You’re at a loss for words as you lightly trace over the ink with your fingertip, the thoughtfulness of the gesture leaving you speechless. He grins, tilting his head. “You really didn’t think I’d get it done?”

Shaking your head with a laugh, you meet his gaze. “You’re full of surprises, Mattheo.”

He gives you a wink, leaning in slightly. “Only for you.”