Prologue:
It's been three years since the whole host club has graduated from Ouran.
Hikaru can't help smiling as he watches Kaoru dance with his new husband. He swears that Kaoru has been so happy since meeting him three months after graduation.
Kaoru's new husband is named Daiki and he has black hair in a short pixie cut, as well as mahogany eyes, with today he's wearing a wonderful black tuxedo. He's a little taller than Kaoru so Kaoru can just lean forward into his neck.
Hikaru actually thinks that Daiki is a pretty cool guy, even their parents approved of him to the point that they approved a link between the two families companies; so Daiki who is now in charge of his family's game production studio can get fashion merch more easily to sell for his games. He's glad that Kaoru found such a wonderful man. He just can't help getting this guy feeling that there is something he needs to be watching out for. He just doesn't know what.
Daiki is such a nice guy and he treats Kaoru so wonderfully. He doesn't seem to have anything about him that'll be bad for Kaoru. He may not be absolutely perfect as the two do get on each others nerves from time to time; though who doesn't?
Surely nothing bad could come from this.
Right?
Hikaru truly hopes that this feeling in his gut is wrong and that everything will be okay. He will make Daiki pay if he does Kaoru wrong in anyway.