@squishy I heard you were interested in some dramas featuring love triangles. This is a very common theme in Kdramas, as well as other Asian dramas. I could start a list, but I’d suggest checking out this website that has a fairly comprehensive list under the tag of ‘love triangle’. Not all of them will be available at Viki, but it’s a good place to start your search.
https://mydramalist.com/search?adv=titles&th=120&so=popular&or=desc&page=1
If you have any questions about the website and how to use it, or about a specific drama, feel free to ask. Lots of people here are willing to answer your questions.