Kai/Rei Ship Headcanons:
Getting Together
Kai is always the one to make the first move. Rei may have feelings first, but Kai is always the one to make the first move.
Rei has feelings first and feelings for a long time. He’s really good at hiding his emotions and buries them down, because Kai doesn't like men, and even if he did, he doesn't like Rei.
So Rei dates. He dates Mao, and they have an on again off again. There’s that brief little fling with Salima, when she and Kane are on break. And then there’s that weird summer with him and Hiro (which solidifies that, yes, he liked men, but no, he didn’t like Hiro.)
But Kai never dates. Never shows interest. But he's always distant when there’s someone in Rei’s life, but once they’re gone, Kai is stuck to him like glue… well sort of. They hang out… sort of. They’ll be in the same room and Kai might say 4 words to him. But it's comfortable. But there's a definite difference in the way Kai treats Rei when Rei is single.
Kai is either one of two scenarios: He has feelings for Rei and knows what he is feeling. Or he has no idea what he’s feeling, but there's something about Rei.
In scenario one: Kai doesn’t want to change things. They’re comfortable. He likes how things are and is… Nervous to act out on his feelings. Again. He likes having Rei around. Likes being in his presence. Hearing his laughs. He doesn't want to lose Rei. Doesnt want to fuck things up.
Scenario two: Literally the whole plot of Feeling Worthy. He has no idea he’s crushing on Rei. And is super nasty, but in moments of clarity he shows his true colors and is nice and caring. But his heart does funny things and it scares him. Fight or Flight going off like crazy.
Always the catalyst is Kai realizing his feelings, or acting impulsively on his feelings (Kissing Rei, unprompted). And then he hides from Rei, until Rei is able to get him to talk it out.
And it's always slow. Rei is more experienced and for once has more confidence than the one he’s with.
Relationship Headcanons
Kai is possessive of Rei, not too overbearing but if someone doesn’t get the hint that Rei is with him, he will make it known. From his harmless hand on Rei’s waist to both hands gripping Rei tightly, lips attracted to Rei’s neck like a magnet suckling on the tan skin. He’s not gotten physical from the possessiveness, but he would. If necessary.
Kai is also fiercely protective of Rei. No one will bad mouth Rei in front of Kai. And if someone upsets Rei? He will do whatever in his power, however much money it takes to rectify the issue.
Rei loves both of the above traits of Kai. It makes him feel wanted. And Loved. (red flag)
When they fight, both will always walk away from the other. When they first get together, Kai disappears for hours. As they grow into their relationship, Kai doesn’t walk out the door, but hides in a different corner of the house.
Kai is always the one who will apologize first, believing it's always his fault. Not that Rei’s not going to apologize, just that Kai is somehow always faster at doing it.
Kai really brings out Rei’s confidence, and Rei is able to get Kai to talk more. They feed off each other.
Kai’s love for Rei is unconditional. He completely understands how free Rei’s heart is, and how hard it is for him to feel at home anywhere he is, but the difference is, Kai would follow him to the ends of the earth. Wherever Rei wants to go, Kai will follow.
Kai spoils Rei. Anything Rei could want, he provides (and sometimes it drives Kai nuts because Rei isn't a material person, so he makes sure to notice things.)
They don't fight a lot, but when they do fight it is from miscommunications. Either Rei doesn’t say exactly what he wants, or Kai can't figure out how to properly communicate.
Also as usual, I see Rei learning Russian (bc my HC of Kai is Japanese/Russian, fight me)
Rei always does all the cooking, when they’re out, or when he tells the chef (because rich boy kai) he’ll handle their meal. Kai is a disaster in the kitchen, but starts taking lessons (under the guise of work meetings) and has the chef watch over him as he prepares a meal for Rei.
Rei remembers when they were kids, Kai always had a soft spot for cats, and well the house is kind of lonely, so he gets Kai three kittens. And it's chaos in the house, but it's perfect. They love it.
Kai isn’t wordy with his wants, so Rei tries really hard to read his partner's needs and wants and fulfill them. Sometimes it's simple, going into Kai’s office and bringing him coffee. Or wrapping his arms around Kai and forcing him to come to bed and sleep for more than three hours. Rei misses him. Or bringing him food when he’s on work calls all day, because if he doesn’t Kai won’t eat.
Rei doesn't drink, usually. But. If Kai is drinking too much, and he wants Kai to stop drinking, he will grab Kai’s drink and down it. It sends a clear signal to Kai that he’s cut off. (And usually it sobers him up, because alcohol makes Rei sleepy and they should probably be leaving or heading back to their room.
In the privacy of their home, they are so touchy feely. Holding hands, cuddling on the couch, etc. In public it’s a lot more reserved. A casual arm around Rei’s waist, Thighs touching while they sit. Holding pinkies.
Also, Kai would 100% propose even if they couldn't legally get married (But he has the money to fly them wherever they could get legally married) And Rei wouldn't believe it because his confidence is still kind of low, but Kai wants to spend forever with him??? (and Rei cries so much)
Kai has made Rei cry (from something other than happiness or ecstasy one time) and Kai wanted to kill himself afterwards. He felt so awful. He couldn't believe he of all people could have caused Rei pain like that.
the grumpy one is soft for the sunshine one
Spicy 🌶️🌶️🌶️
They’re Vers, but: when Kai bottoms he’s a power bottom. He likes being in charge and in control. He likes being on top, when he’s on the bottom. He likes to see all the pretty faces Rei makes.
Their first time, Kai insists on bottoming. And Rei is so hesitant and insists that he will bottom. Kai gets his way and bottoms and uses that, the internet and his own body as research for when it’s Rei’s turn.
Rei likes when Kai manhandles him. Even though there’s not quite a height difference. But Kai is stronger. He works out more and for mass and muscles. While Rei does more to stay flexible and in shape. Kai is good at flipping him around. Holding him against things etc. while reis good at being folded up.
Kai is really into marking Rei. Rei isn’t really into marking Kai, unless Kai pushes it. (But scratching? Rei is kind really into scratching. And his nails are always somehow sharp) kai tries not to mark Rei in places others can see because they're not 16 anymore, but sometimes it's a heat of the moment thing, or they’re somewhere where kai needs others to know Rei is taken.
Other’s
Takao thinks its weird that Rei, Mr. Sunshine, is with Mr. Doom and Gloom, Kai. Takao likes that Rei brings out a different side of Kai when they're together. Kai’s a lot less moody when Rei is with him.
Max is so supportive of them! Max equates Kai to an older brother, and Rei is one of his best friends. So their happiness is so important to Max, and that they are happy with each other!!
Hiromi is kind of obsessed with them.
The Borg Boys are so surprised by Kai’s choice of partner. Not that Kai is with a guy, because they all know Kai is gay as hell, but Rei? Rei? Very similar reaction to Takao, because they seem like polar opposites. It’s weird. But they can't deny that Kai smiles more in the presence of his Sunshine.
They will give Kai a hard time, as well as Rei a hard time, but it's an affectionate sort of hard time. And they treat him like part of the found family
White Tigers are 100% against it, at first. There’s some mild homophobia by the men of the team. And Mao is just against it being Kai (And tbh in all my Borg Boy X Rei HC the white tigers are not a fan of the relationship). But it is so important to Rei to keep them in his life, that Kai makes it his mission to get them to like him, and give their relationship their blessing. Because Kai’s usual reaction to oh XYZ doesnt like us dating is fuck them, but these people are Rei’s family.
And it pains Kai to try and rehabilitate his reputation with the White Tigers. They meet on neutral ground in the city for their first meetup and Rei is so nervous. Lee, Gary and Kevin are kind of mean about the whole meetup, and Rei puts on a brave face. And Mao is more annoyed because its Kai, of all the Borg Boys it's him. (She’d take Boris over Kai). But Lee goes too far and Rei starts crying and excuses himself, and Kai goes off on them. How dare they? After everything, how dare they be so disrespectful to Rei. I didn't even want to be here, but this mattered to Rei. Your approval was all he cared about, but you guys want to treat him like shit? I won't stop him from visiting, but believe me I will try my hardest to talk him out of it. He doesn’t deserve any of this. He is the sweetest, kindest person I know. He is so patient, he’d wait until the world ended to get the approval from the White Tigers. Then he’d drop enough money on the table to cover the whole bill plus, and collect Rei from wherever he ran to. (And Kai’s dialogue wins over Mao. Then she works on the rest of the team, but it takes Rei months to work up the courage to go back to China. But Rei really wants to go back for a festival, so they do. Kai and Mao work out an arraignment for Rei to see them. And it finally works out. With apologies and everything.)
Mr. Dickinson is so thrilled when any of his young bladers get into relationships, especially when it's with each other. He sees Rei as a sort of grandson, after everything he’s done for Rei, so he’s even more thrilled. And then! Kai of all people! In a relationship! Thriving, Happy! What more could he ask for!
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