Who do You Serve? (слэш)

Regulus had gotten in over his head. How could he not? Thomas Riddle was astounding and thirteen year old him was utterly enamored. When fourteen year old him officially met the infamous Dark Lord thanks to both Lucius Malfoy and, surprisingly enough, Severus Snape, he could not help but be in utter awe. Their relationship did not last long...It could not, after all. Tom Riddle was so much older than him, but that had not seemed to matter at the time. He had not realized how far gone he was until the man divulged to him about the Horcruxes before his fifth birthday...he had been horrified, and that had been where he made his mistake. Tom Riddle, he saw it. Then trapped him in with one, despite Regulus' screams and pleas.