FYI I’m also counting stories where the couple get together really quick
https://www.mangago.me/read-manga/don_t_mess_with_the_puppy/ OKAY SO HEAR ME OUT HEAR ME OUT! TECHNICALLY one of them THOUGHT they were dating like… the entire time (around the 5th chapter). I love the ml and Mc in this so much and they have AMAZING chemistry.
https://www.mangago.me/read-manga/smyrna_capri/ TECHNICALLY they’ve been bound to each other and thus are TOGETHER early in the story. It takes a little for the uke to allow himself to love the seme, but once it happens, they’re so CUTEEEE
https://www.mangago.me/read-manga/the_mountain_branches_dream_of_goblins/ how do I even defend this… Okay so like, they got their SOULS bound together and TECHNICALLY they are together… if you squint. The reason why I included this one despite it not fitting your request is because of how much I love this couple. Their bickering is absolutely hilarious, their smut is amazing, and watching them slowly get more comfortable and understand one another more was a joy.
https://www.mangago.me/read-manga/red_string_quests/ Kind of??? They’re bound by the red string of fate so… The smut in this one is amazing as well + this couple is really cute. I can’t believe this IDIOTS managed to make me cry.
https://www.mangago.me/read-manga/the_third_decade_dindin/ Oh my god… THIS ACTUALLY FITS THE PROMPT :D! I can’t tell you about the current events in this story since I’m waiting for the officials, but they show a lot of promise.
https://www.mangago.me/read-manga/biscuit_1/ They also get together pretty early on (against the seme’s will). FYI, the uke in this is SUCH A BADDIE OH MY GOD HE’S SO HOT

PLSSSS GIVE ME YAOI WITH THE MAIN CHARACTERS DATING FROM THE VERY START AND IS CUTE AND STILL TOGETHER UNTIL THE VERY END PLEASEEEEEEEE (manhwa or manga)