Van Helsing AU in which Yuuji is Dracula and his husbands are Satoru, Toji and Suguru. Ryoumen is Gabriel, his long enemy/lover.
Or better yet, Ryoumen is Dracula and Yuuji's Princess Ana whilst Suguru or Satoru is Gabriel.
Orrrr Yuuji's Gabriel and Toji or Ryoumen are Dracula. They take their time in non conning the teen before Satoru or Suguru who are the male versions of Princess Ana.
Honestly, there are so many angles to this that I can't choose 💀