iwaoidaisuga hc that oisuga share their ler modes and when they do they tease daichi the whole day, give him ticklish kisses on his neck or jab his side when they pass him because they know it drives both, daich AND iwa up the wall. daichi because he doesn't get really tickled and iwa because he doesn't get tickled at all and he's too stubborn to ask for it! If he asks them until evening nevertheless, oisuga will wreck iwadai, if not they'll slowly tease them into asking for it
Okay listen, you would think IwaDai are the ones that do the tickling the most BUT WRONG, OiSuga are the tickle monsters in this relationship!
They can't keep their hands to themselves! They're always tickling IwaDai 🥺 and they always team up against them (IwaDai)!
BUT ODKDKF Omg OiSuga know that Iwa doesn't ask for it AT. ALL. but he's always thirsty for it, so OiSuga have to sacrifice Daichi more often than not to force Iwa to admit he also wants some tickles 🥺
Like, as you say, they do little things like kissing Daichi's neck or tickling his sides or even launching a full on attack RIGHT beside Iwa while they're cuddling in the couch just to make him admit that he also wants it!
Aaaahhh and imagine him actually asking for it kdkdkf he'd be all like "I... Y-you... C-c-could-" and Suga is like "say 'I want blueberries' if you want us to tickle you, Hajime~" and he wiggles his pretty fingers at Iwa and Iwa blushes so much!
"I... I want... b-b-blueberries..."
And they tickle him until he's crying and shaking with silent laughter and even Daichi joins in the fun sjdkkd
BUT Daichi is also a little stubborn, however, they don't know why but OiSuga just jump on him every single time because he looks so sad when he's not getting his tickles 🥺
AND WHEN THEY TICKLE IWADAI TOGETHER omg dkdkkff like OiSuga would tell the each other where AND how to tickle IwaDai!
"Kou-chan, Kou-chan, pinch Iwa's hips like this~"
"Oh I see! Ah, but Tooru, that spot is really good on Daichi, but you should tickle his highest ribs, those are pretty sensitive!"
"NO! T-TOORU D-DON'T D-DAHAHAHAHA!"
ALSO OMG can you please take a moment to imagine OiSuga having tickle fights? 🥺🥺 They're giggling and blushing so much and IwaDai are just 😍😍 when that happens!
Oh fuck, IwaOiDaiSuga is so fucking good 💕💕💕💕