@sweetsatang i just sort of assume most people have watched the handmaiden but if you haven't, you must get to it asap
Athena recommends Couple of mirror and I've watched that halfway. It is a mystery with censored lesbian romance. I liked the on-screen chemistry a lot but after eps 5 I switched over to the manhua. It isn't exactly a thriller
You could try Wrath of Desire (lesbians have a hard life), Ride or Die (lesbians on the run). I'm watching Spider lillies and if it classifies, I'll let you know!