I'm looking for a specific fanfic

Hi, it's the first time ever I write something here and I'm looking for a fanfic i'm pretty sure it was on AO3 I lost the link and I really want find it again, all I can remember is the story starts with Santana claiming Blaine because she's a dom and Blaine is a sub because their parents make an agremment but they're just best friends, later Santana claims Brittany as her sub and Blaine tries to find a Dom for himself and he finds Kurt but it turns out Kurt is not a dom he's a gray a person who can't be classificaded as a dom or a sub Blaine is really sad because he thinks they can't be together, Kurt told him about his past with he was dating a Dom (Adam) an it didn't work out at all. Eventually,their feelings for each other make them want to try work out their relationship. Oh, Elliott and Rachel are part of this fanfic too.
So please if anyone can help me with this I would really appreciate it. 😟