E-sim in korea

I'm gonna be travelling to South Korea (again) soon and I really want to use an esim for data. I've been to korea four times and have used a sim card once and a wifi egg twice. Last year I went to Japan and used an esim for the first time and I loved the convenience of it working as soon as you land and also the fact that you don't have to return anything before your flight back. The site I used in Japan was ubigi and it worked quite well. I feel like they don't have the best packages for korea though.. I've looked on klook as well and they either have packages with unlimited data from a trustworthy korean telecom provider for 35+ euro's or packages from a random company which are cheaper.

I was wondering if anyone had any recommendations for a good esim provider which they have experience with in South Korea (or at least asia)?