NSFW Reader-Insert Headcanon Scenarios ; Heartslabyul

by SleepingDeath

Summary:

An updating collection of all the smutty headcanon-format posts I’ve made that involve Cater, Trey, or both being paired with a reader insert character.

Unless explicitly stated in the title of a chapter, please assume that the reader insert is gender neutral.

Tags and pairings will be updated as necessary to account for new requests.

The lowercase text is intentional.

Chapter 1: what trey clover is like in the bedroom

Summary:

originally posted in april 2026.

• trey clover, heartslabyul’s collective older brother and the man who seems to have borderline endless patience for those he cares for (and who is very good at hiding just how little he has for those he doesn’t), is a man who falls more so on the vanilla end of the spectrum when it comes to what he enjoys in the bedroom. not to say that he can’t enjoy spicing things up every now and again, or that he isn’t willing to try new kinks if you ask him nicely (he is terribly indulgent with you, after all… perhaps more than he ought to be), just that if left up to him he’d quite happily just take having sex with you as is. maybe switch up the positions once in a while, maybe draw out foreplay every now and then to watch you squirm, but otherwise he just likes to keep things simple. because what’s the point in adding in unnecessary ingredients when you already have the perfect recipe?
• more often than not, trey falls quite firmly into the soft dominant category. but he wouldn’t necessarily call himself a ‘dominant’... if only because he doesn’t particularly enjoy using strict roles with you when you’re having sex and is generally someone who leans a bit too familiar for the title to carry much weight either way. that being said, unless you explicitly state your desire to take the reins from him, chances are he’s going to be the one in control of the pace and rhythm and such whenever you two are intimate. it’s a very soft and subtle control, one that comes pretty naturally to him, but it’s still there and just enough to warrant him earning the label regardless of whether he’d describe himself that way or not
• he much prefers a well behaved partner over a brat, if only because it’s nice to have someone actually listen to him the first time round after spending all day correcting his underclassmen and trying desperately to keep his housewarden in check. that being said, his experience taming the rose red tyrant’s temper lends itself well to him being a very effective brat tamer if that’s what you need out of a lover… and sometimes, if you catch him in a more playful mood, he may even swing towards being a brat indulger instead, just to see what will happen
• he may not necessarily look it, but trey does have a good amount of physical strength in him — courtesy of just how much time he spends hauling around heavy bags of ingredients and baking everything for the unbirthday parties by hand — and if you ask him nicely he can be convinced to use that strength on you when you’re being intimate. specifically just to manhandle you into whatever position you both agreed upon, and maybe maybe to lightly choke you once if you beg for it enough. but, again, trey’s tastes do generally lean rather vanilla so moments like that are more of a rare treat than a common occurance for you both
• as far as positions go, trey much prefers the ones that allow him to see your face and observe all of your wonderful reactions to the pleasure he’s giving you. with missionary and the mating press being the two he defaults to more often than not, partially out of convenience and familiarity, and partially out of general preference. that being said, he can also quite enjoy being ridden in the cowgirl or lotus positions, and fucking you against the wall also has its appeal… just only when you’re in an area where he knows you’re unlikely to get caught as he’s painfully aware of how much sound carries both in his family home and in the dorms… so… time and place
• he’s not very loud and is very intentional about his volume and tone, but trey is nonetheless a very vocal partner. not the most vocal out of the night raven college student body by a long shot — as he has some exceptionally chatty competition — but from the second you get into bed up until the point where you’re engaging in aftercare together trey will be alternating between shushing you, teasing you, praising you, and muttering curses as he gets closer and closer to finishing. one thing he will not do, however, is degrade you as he just can’t bring himself to insult or belittle you even within the context of consensual play — he just can’t stomach it… call him vanilla if you want but that’s just one hard limit he refuses to cross no matter how much or how nicely you beg him for it
• he much prefers to indulge instead of denying you anything, both in and outside of the bedroom, but if you push his buttons enough he isn’t above leaning heavily into either orgasm denial or using ruined orgasms as a means of messing with you and getting you to apologise for whatever you did you warrant him holding a bit of a grudge against you. though he has a lot of patience, especially with you, so you’ll have to actively try to get a reaction like this and at that point it’s pretty much like you’re begging for the punishment so…
• trey didn’t necessarily realise it before getting with you but he absolutely has a breeding kink. and even if you’re straight up not capable of getting pregnant he gets super into the experience of breeding you — and that definitely shows in how he talks to you when you’re having unprotected sex… though he does usually come out the other side surprisingly bashful about the experience and even a smidge apologetic, up until you two have been together for long enough that the shame has worn off, anyway…
• while he’s not against incorporating toys into your sex life, he is particular about the types of toys he’s comfortable using with you — researching each brand and specific toy thoroughly to make sure they’re safe before even thinking about buying them, and even then still mostly sticking to the basics. because for as much as he can appreciate their value in spicing things up and bringing in some more variety, he’s still a more vanilla guy and doesn’t really have much need for anything more elaborate than a vibrator, a dildo, and maybe some blindfolds and safety graded restraints to fulfil a more specific request/fantasy of yours
• much like how he’s more willing to be playful with you the longer you’re together, as your relationship progresses you’ll notice trey getting gradually more and more playful and willing to take risks with you. never anything too severe, and not without a lot of conversation beforehand, but the change is still impossible not to notice unless you’re deliberately playing ignorant about it
• the most sexually sensitive parts of his body — not including the obvious — are his hips, the pulse point on his throat, and his inner thighs. and any attempts to bite or kiss those places will have him flushing pink with a mortifying quickness before he regains just enough composure to try and redirect your attention elsewhere
• he is very good at giving oral and when he really gets into it it’s surprisingly easy for him to almost lose himself in the act. in fact, for how long he can go on — even to the point of overstimulating you to the point of tears if he’s really into it, though he’s usually aware enough to at least give you a break between rounds — you’d be tempted to think that he’s enjoying it more than you are
• receiving oral is also something that trey quite enjoys, though to a slightly lesser extent than giving it, and he’ll rarely ever turn you down if you offer to suck his dick. jus be warned, though, that unless you’ve actually trained out your gag reflex you won’t really be able to deepthroat him and will have to stick to sucking his tip and jerking him off instead as he is very large and you will struggle to fully take him in your mouth

Series this work belongs to:

• Part 13 of twisted wonderland headcanon sets