Regulus Arcturus Black was a harsh man. A cold one. The same stone expression graced his sharp facial features nearly every day. He was not the one to "have fun" or "let himself go." He was strick, ambitious, and focused on alway being on top. Whether it was quidditch, potions, a test, or simply drinking firewhisky faster than Evan, he had to win.
...and then he won something on accident. You. Regulus once won himself a girlfriend and said girlfriend somehow found a way to stick around since 4th year. The boy simply could not comprehend how a person this kind could be with someone this... him. Yet, not a single other win of his has ever felt so good— which is a big statement because Regulus won a lot of things in his life. Quidditch cups, house cups, highest scores in class, tests, the status of the family heir, being the favourite child, motherly love... it was all so small compared to your heart, truly. Best of all is that whenever he won, you were the very first person to congratulate him. Not even his own parents, nor Sirius, ever made such effort.
Just like right now. Nearly tripping over your feet, your cheeks rosy red from cold, crisp, November air, as you rushed down the stands to your boyfriend after Slytherin won the match against Ravenclaw He didn't even properly get off his broom, breath still shallow, and the golden snitch rattling between his fingers as you threw himself onto him.