٩(๑❛ᴗ❛๑)۶Anyone know a bl with two twin semes who are madly in love with the u...

I've read a manga with similar story. Are you looking for a manga or manhwa?

https://www.mangago.me/read-manga/aisaretagari_no_gemini/

https://www.mangago.me/read-manga/aishitagari_w_darling/

I can recommend this one -
https://www.mangago.me/read-manga/futari_no_musuko_ni_nerawarete_imasu/

I read both so it doesn't matter if it's a manga or manhwa!:)