Okay Im going to give three fic ideas I doubt I would be able to do for Rosestarkiller, Bartylus, Moonwater and the Black brothers. If you like the ideas and want to use them good I would love to read them I just can't write every fic I have an idea for.
If you want more for this three ships (and Rosewater I just don't have a lot in my doc) just ask me I am happy to give more idea I got too many bouncing in my head.
Regulus was roommates with Evan and Evan has a boyfriend named Barty that is over all the time and its fine after all mostly Regulus is in his room or at classes, maybe sometimes visiting his brother. But one problem Barty walks around shirtless like he owns the place. Worse he is hot and Regulus is gaining a crush on his roommate’s boyfriend but maybe that was the plan all along.
Barty was supposed to die. He was supposed to be dead to meet his friends again. Evan with his soft smirk, Pandora with her airy laugh, Dorcas with her eyerolls and Regulus with his soft kisses. Everything was silent the moment the dementor got close enough…until he heard beeping and his eyes opened and was in his old bedroom young again. He wasn’t just alive he was in the past and boy does he have a lot to do.
Pirate AU Sirius runs away with James to join his pirate crew and leave his crown. Three years later Regulus after believing pirates took his brother and runs away with Pandora his arranged fiance (they are more like siblings) joining Pandora's brother, Evan's crew of pirates. Regulus is going to find Sirius and Sirius hears news that the most dangerous pirate crew kidnapped his brother and needs to rescue him. AKA both brothers think they are going to rescue the other only to find neither need rescuing.
Regulus obliviates himself after the cave maybe from all the trauma and one day while going through his normal day in the muggle world Remus finds him, his ex-boyfriend that he no longer remembers.
Remus found in one of the books he grabbed a note placed in it where someone wrote on a ripped piece of parchment notes on the book. He found it entertaining to get to the part of the book the person has written down and read what they wrote about it. So he picked a similar book and did the same writing what the next book he was going to do, and it repeated not knowing it was Regulus on the other side of the paper.
Remus and Regulus soulmate au where the soulmates can feel each other’s pain so Remus feels random spikes of pain of the curcio and Regulus felt each time Remus transforms during the full moon.
Barty always joked to Regulus that he looked like an angel with his innocent face and act. Regulus is starting to worry that maybe Barty has figured out that he is a fallen angel and is now messing with him. In other words Regulus’s past as an angel before falling and transitioning to the man he is known today.
Regulus dreaded the day he came of age and had to get married, but at least his parents let him decide on how he would win, so he asked for it to be an archery contest. Most people of his kingdom were good with swords, but not many were good with arrows, and if someone was, they had to mess up, right? So it was foolproof until one man from a rivaling kingdom decided to compete. Bonus points of Barty and Regulus were lovers in secret and were going to be torn apart but Regulus didn’t know Barty would do anything to make sure they don’t.
Regulus and Barty fake date as a joke on their friends but it back fires because turns out their friends thought they already liked each other the whole time.
Sirius ran away at a young age maybe 12 when he is 20 Narcissa found him and told him after he ran away his parents had another kid. Now he needs to make sure Regulus doesn’t have the same fate as him or worse.
When Regulus runs away he gets to a phonebooth and with shaky hands types out a number, a number he had for years that his older brother gave him when he ran away but worried it wouldn’t work. But it does work because Sirius never once changed the number picking up every call in hope one day Regulus would call him.
Andromeda tried to protect Sirius when he was younger and was about to get his first punishment and forced to watch. Years later Sirius has the same fate when it was Regulus’s turn.