Headcanons for things that the boys would do for/to an s/o that they’d become attached to? (xeno AU)

Admin Mawile: ( ◞・౪・) Because of length, this part just covers the clinginess. There’s more, but that will be for other asks~

Shuu: 

-He starts to be inexplicably close to you at all times, sleeping somewhere a mere few feet away and claiming that it’s just “coincidence”. It’s harder and harder for him to get proper rest without being able to smell you nearby, and the more attached he is, the greater the need to have you close.

Reiji:

-At first, he just gets fussy, following you around and complaining about every minute thing you do wrong. It quickly becomes obvious that it’s just an excuse to get close to you, especially when he starts demanding your help with random duties just so you’ll be forced to be near him. 

Ayato:

-He very openly demands your company, and will resort to physically keeping you with him if you resist. He’s started to feel nervous when you aren’t close by, and that feeling makes him so sick, he has no choice but to give in to instinct and make sure you can’t leave him. 

Kanato:

-From the first time he cries because you aren’t close enough, he more or less forces you to stay with him at all times. He refuses to admit that he actually wants you, and comes up with all kinds of strange excuses as to why you’re not allowed to be more than a few feet away. 

Laito:

-He despises having genuine feelings of any kind, and resists the impulse to need you for as long as he possibly can, even going so far as to distract himself with other lovers. When he finally does give in, it ends in even more intense possessiveness than usual, because of so long without. 

Subaru:

-He absolutely hates admitting to needing you, and covers up the sudden need to have you close with flimsy excuses, many broken objects, and a lot of yelling. It’s almost pathetically obvious how your presence affects him, especially when he gives in and starts using force to keep you close. 

Ruki:

-He’s extremely subtle, and does everything possible to hide how nervous he feels when you aren’t in his sight. Sometime around the time he starts having nightmares about you, he starts forcing you to stay close to him, claiming it to be just another way of controlling you. 

Kou:

-Despite being extremely wary of just how indebted to you he could become, he can’t fight the sudden, overwhelming need to have you near. It’s painfully obvious how frantic he is, and it’s very hard to feel anything but sympathy for how powerfully the new instinct affects him. 

Yuuma:

-Honestly. he’s dense enough that the attachment takes forever to really affect him. Once it does, though, it hits hard, and when you suddenly feel every bit as important as his family, you’ll find yourself forced to spend all but every second with a grouchy, newly overprotective Yuuma. 

Azusa:

-If you though he was clingy before, you’re about to see just how bad it can get. His neediness absolute skyrockets, transforming into an all consuming need to be as close to you as possible. With no pride to stifle the instincts, he very quickly becomes consumed by them. 

Carla:

-He won’t show a bit of the new desire until it’s forced out of him. He forces it down and stifles every urge until it makes him sick, and by then, the pull is so strong there’s no way to manage it with dignity. His demeanor change from cold to viciously controlling in an instant. 

Shin:

-While he hates the idea of being bound to you by his own mind, even he can’t resist the instinctive pull for long. He becomes violently possessive and prone to even more risky behavior, caught between his hatred of giving in to the instinct and the desire to just be close to you. 

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