Prompt: Regulus Black/ Harry Potter "Look, don't touch"

Sirius Black was considered the white sheep of the Black family; he had been sorted into Gryffindor, was loud, enjoyed playing pranks, and had no sense of decorum. His younger brother Regulus, however, was considered weak by the Black family; he was quiet, dreamy, and rather passive. In the opinion of the Black family, neither showed the verve and passion that was found in true Blacks; they hadn't cursed anyone permanently or anything!

When Regulus went to Hogwarts two years after Sirius first departed, he had the misfortune of dealing with his older brother's gang and their malicious pranks. He hated the pranks and thought Sirius was a moron, Lupin was an intelligent ass, Potter was the devil sent from the depths of hell to torture him, and Pettigrew was an unwitting dupe. Potter, it seemed, hated him for being Sirius's brother; Regulus couldn't quite figure that one out. Did he hate him for being his brother because Potter wants to be his brother or did he hate his for being Sirius's brother just because he could? Regulus just sighed and carried on with the school year.

The next year at Kings Cross Station, Regulus spotted a most intriguing site: James Potter, and a younger green eyed version of himself. The second the elder Potters left the platform, James abandoned the firstie Potter to his heavy trunk in order to go meet up with his friends. For the first time in his life, Regulus realized what his parents had meant when they said 'Blacks always know when they meet their soul mates! It's in the blood.' His blood felt like it was on fire as it rushed through his veins. Regulus firmly and confidently walked through the crownds over to the green-eyed Potter.

"Hullo," he said with a smile as the younger whirled around. "I'm Regulus Black. Would you like a hand with your trunk?"

The green-eyed boy smiled beatifically. "Oh, yes please! James was supposed to help me with it but he went to find his friends instead and I can barely lift it, let alone drag it. I'm Hadrian Potter, by the way, but James calls me Harry; you can too, if you'd like." The nervous first year continued to chatter with Regulus only occasionally interjecting a remark as they carried the trunk into Regulus's already claimed compartment.

The two got settled into their compartment and Regulus pulled out a book.

"Have you read Hogwart, A History yet, Hadrian?" Regulus asked slyly. The other boy's head shook from side to side, sending his wild, messy curls flying about.

"Not yet. I wanted to but James took my copy and sent it off to some girl named Evans," the boy pouted cutely. "I told Mum and Da and they got me a new one but it just came in two days ago and I haven't had time to read it."

"Let's read it together then," proposed Regulus, pleased at the idea of finding an activity where his Hadrian would be seated next to him for the entire train ride.

An hour later, Harry was asleep on Regulus's shoulder and Regulus was plotting on how to keep his little soul mate with him at Hogwarts. Then the door opened.

"Everything alright, Regulus?" Narcissa Black inquired as she made her rounds as Head Girl.

"Oh! Who is this? He's so cute." She cooed as she reached to touch Hadrian's hair. A stinging jinx caught her on the hand before she could reach him and when she turned to scold Regulus, she faced the eyes of a truly possessive Black.

"Look, don't touch," he snarled quietly, pulling Harry closer to him.

Narcissa smiled brightly, "You found him then? Your soul mate."

"I did… and I'm keeping him. No matter what Potter says about stealing his brother," murmured Regulus as he cuddled Harry closer.

"Of course you are, you're a Black. Congratulations, cousin."

"Thank you." The unspoken 'now go away' hung in the air and Narcissa's smile grew even brighter. She left the compartment and headed straight for her trunk where she had a two way mirror with Bellatrix who could inform the rest of the family. They were Blacks, after all, and looked after their own.

A/N: Well, I hope you liked it! If you have any pairing suggestions or prompt ideas, I'd love to hear from you via review or PM. Thanks!