Chapter 1: The Unlikely Discovery

It was a typical Wednesday morning at Hogwarts School of Witchcraft and Wizardry, with students bustling about, eager to start their day. Sirius Black, a fifth-year student and member of Gryffindor House, was no exception. He had just finished a leisurely breakfast in the Great Hall and was strolling down the corridor, lost in thought. As he approached the dormitories, he noticed a peculiar sight that made him stop dead in his tracks. Regulus Black, his older brother, was walking around the exterior of Barty and Evan's dormitory in nothing but a pair of thongs and a faded t-shirt. Sirius's eyes widened in shock as he took in the sight. What on earth was Reg doing? He looked like a madman, and what was even more bizarre was that he seemed to be enjoying himself. Sirius's curiosity got the better of him, and he found himself creeping closer to get a better look. Reg was humming a tune as he strolled around the dorm, his thongs making soft slapping sounds on the stone floor. Sirius's eyes were fixed on his brother's backside, and he couldn't help but chuckle to himself. Who would have thought that Reg, the usually stoic and serious brother, had a quirky side? Just as Sirius was about to retreat, he heard a loud spanking sound, followed by a yelp of pain. He turned to see Reg standing in front of the dormitory door, his hand still raised, and Barty and Evan standing behind him, looking shocked and embarrassed. "Reg, what on earth...?" Sirius trailed off, unsure of how to finish the sentence. Reg turned to face him, a mischievous glint in his eye. "Just keeping the lads in line, Sirius," he said, with a sly smile. Barty and Evan looked like they were about to die from embarrassment. "Reg, stop it," Barty hissed, trying to cover himself with his robes. Evan just shook his head, looking like he was trying not to laugh. "You're enjoying this, aren't you, Reg?" he said, his voice laced with amusement. Reg just chuckled and continued to tease his friends, leaving Sirius to wonder what on earth he had just stumbled upon. As he backed away, trying not to draw attention to himself, he couldn't help but feel that his life was about to get a lot more interesting. Little did Sirius know, this was just the beginning of a series of events that would change his perception of his brother and his friends forever. And as he made his way back to Gryffindor Tower, he couldn't help but wonder what other secrets lay hidden beneath the surface of Hogwarts.