If you mean what the rock is saying, it was previously mentioned at the start of this arc. Basically seme forced a red thread between them but uke was actually someone that shouldnt have a red thread. Now that they are forced to have one, he lives a life of misfortune (like getting attacked, getting into accidents, etc)
Basically they are doomed if they keep up the red thread between them even in the next lives
alright sweetie
so the black pebble is explaining to that pretty boy that destiny usually chooses which one will be our greatest love in life, however there are times when destiny doesn't pair us with someone
that doesn't mean that we'll be sad, don't worry sweetheart, we'll just be like a little sun! not quite lonely but happy to make other people smile! but there are times when you want these kind of people to yourself and try to force destiny...
so you do a lil cute knot on their finger and bam! destined to be each other greatest love, but this will bring very bad luck to the little sun
this means you can't just force destiny sweetie, or that'll come back striking you! just like those arrows that killed our pretty boy! (▰˘◡˘▰)
I'm dying i did a whole wall long ass paragraph and it was a fucking easy explanation after all t.t
I was having trouble summarizing it BRUH T.T
btw yeah it's kinda lame that they're doomed but i'm pretty sure the lil pebble will just say "oh but you were cute af while fucking each other so here ya go a lil gift!" and then bam they'll just have that lil ring thread forever and fuck every hour like little bunnies
i get the angst tho, but cmon none of the kids is gonna die

Ok can someone explain to me like I’m 5 what is the black bubble trying to say