Anything similar? I love let dai it’s literally my favorite manga

If you're looking for similar 1990s enemies to lovers vibes "1999 Shanghai" is a good bet, but it is much shorter and also tragedy, fair warning. If you want a similarly toxic beginning and slow-burn, then "Under Grand Hotel" is really good. If you want something with teens coming to terms (sometimes not very well) with their sexuality and also some intense moments, then "Yatteraneeze!" is great (●'◡'●)ﾉ