The Stars Aligned
”Think about it,” Regulus insisted, leaning on the wooden railing and looking straight at Severus. ”You could be free.”
”Your family would never agree to it,” Severus dismissed, looking at the darkening lake.
”Maybe not,” the young Black said, unconcerned. ”But we are never going to know that if we don’t try.”
”Look…”
”No, you look, Snape. I am offering you a future. A way out. A life. Why would you choose to be indebted to Malfoy over an apprenticeship when I can offer you a better deal with much more favourable conditions?”
”I’m not sure what you would get out of this… agreement.”
Regulus Black groaned.
”You dense idiot. I get you. As my husband. In my bed. For the rest of our lives.”
Or:
In one lifetime, Regulus Black and Severus Snape ignore each other in their time as students.
In another, Regulus Black proposes to Severus six months before the older boy graduates.
Because this time, Regulus is determined to have a happy ever after.