I'm so sorry it took me so long to respond anon, my brain has been stuffed with other things 😭😭 the difficult thing about this is that, well, there's so many ways it could go!! my initial thought is that both of these guys are so emotionally constipated they would've been dedicated to taking those feelings to the grave if other people didn't push them to finally get together hfdkfjdj. and it's not like they're oblivious; they're very perceptive and have probably noticed that the other has some kind of feelings for them!! it's just that these morons are so reluctant to accept happiness when it's given to them. they don't think they deserve it or that they're ~supposed~ to have good things, even just subconsciously, that they push away these opportunities time and time again until someone forces them to see sense.

but let's just say that that isn't the case (i for one would also like to put their respective traumas aside and focus on the fluff/humor potential). i like the thought of lyney orchestrating some kind of over-the-top confession event, but i think the vulnerability involved would make lyney kind of shrink in on himself the way he does when he's around people he's close to. his confession would be a whispered one in the dark when wriothesley is almost asleep, or mumbled under his breath when wriothesley is busy with work, to give him just a smidge of plausible deniability in case wrio reacts negatively to it. maybe he has to give it a few tries, laughing it off out of reflex whenever wrio asks him to repeat himself because despite everything he's still afraid of opening up like that.

wrio feels different to me, even if his uh. emotional situation is similar to lyney's. he seems like a guy that values honesty, and maybe he might just tell lyney about his feelings once he's 100% sure they exist just so lyney like knows what's up with him?? bc i think their falling in love would be a slow and gradual process, and the more wrio falls the more his behaviour shifts, which is something lyney easily picks up on. his confession is more of a selfless action meant to put lyney at ease, to clear the air between them, and he stresses that he doesn't expect lyney to return his feelings, just to tell wrio where his boundaries lie so wrio doesn't accidentally cross them.

but ultimately, cheesy as it sounds, it feels like a confession between them doesn't need words. neither of them seem particularly concerned with the line people see between platonic and romantic relationships, especially when they're already sexually involved with each other. i think that maybe one day they're just casually spending time together and it kind of sinks in how much they've learned to trust each other and how much they've found a home in each other, even if they're scared to admit to themselves or anyone else how much the other means to them. they just kind of naturally learn, together and with each other, how to let others in and be vulnerable around each other, and by the time they realise how far they've gotten, they're not pulling back, even if they might have before. they've gotten so used to each other that it's not as scary anymore, and they don't want to let go of that newfound safety. and if that happens to come with casual displays of affection and kisses, sure, they'll take it!

this is of course assuming a mostly canon compliant setting, so if you're heading into au territory there are even more options to consider!! this is all i have for now though, but if you want me to go more in depth or have different questions feel free to let me know!!! 💞💞