Stealing a star

Has anyone read this fic? Stealing a star (he stole himself)? I’m currently reading it and I gotta say, I love everyone in this except Remus. I’m curious to see other people’s thoughts on it. I feel like he’s unnecessarily cruel in this. I love the idea of Regulus and Remus being friends but idk, not if it makes him like this. But I’m only on chapter 13.