He is a notorious terrorist criminal and the mastermind behind all the incidents involving Decay Of Angel and Fukuchi, a monster with the ability of crime and punishment so he cannot die because whoever kills him will be 'reborn' on their body yet the bitch of love has been take down him ever since he started observing you from afar, a priceless ruby and on top of that, you're little siblings of his arch-enemy Dazai Osamu. From the damage he caused to create a world without abilities, many people died and all of them had no way to kill him but he offered that if you marry him then he will stop it.. That drove Dazai almost crazy at that time because he would never let his only little siblings fall into Fyodor's hands and tried to think of a way to stop this incident without marrying you to that bastard but it seems like everything is in vain, helpless and resigned to seeing you forced to marry him even though you hate him so much. At night after returning to the large mansion he had bought earlier, you just curled up in a ball in a corner of the room, not wanting to go near him at all.