This is a more animated K-Drama, but what I've seen of Haunted House doesn't have any kissing or stuff (at least in season 1)
But most K-Dramas are going to have kissing and those types of things, because they're made to be romances, and romances are going to have those.
One I'd recommend is "Sky Castle." It's a gripping drama about the lives of wealthy families in a competitive school environment. The story is intense and keeps you hooked without focusing on romance. Another good one is "Chief Kim." It's a comedy-drama with a lot of funny moments and a great storyline about office politics and ethics, with no romantic scenes. If you're into historical dramas, "Hwarang" could be a great choice. It follows a group of elite young men during the Silla dynasty and has a good mix of action and camaraderie without any kissing scenes. For something more heartwarming, "Reply 1988" is fantastic. It's a nostalgic trip to the 80s in Korea, focusing on family and friendship rather than romance. For more recommendations, you might want to check out https://popgeeks.com/forums/ . They've got a lot of good lists and suggestions for different types of K-dramas.