The
Reply series that
Dragoon mentioned upthread is on Netflix. They're pretty popular and highly regarded. Three separate series.
Reply 1997.
Reply 1994.
Reply 1988. They're nostalgic looks at Korea during those years focused on a family and their extended friends. Different family/characters for each series - although there are some cameo appearances, and the same actors play the "parents" in each of those shows. Comedy, romance, friendship, social commentary, slice of life, nostalgia. Definitely worth a look.
Secret Affair, also on Netflix. I mention this because it's by the same director as OSN and SITR. But it's very different. This time, it's an extramarital love affair between a young 20-something underprivileged piano prodigy and a 40-something executive at a school foundation. Cheating is a sensitive subject. Some people can't tolerate shows about it at all, but I recommend this still, because it's one of those most beautifully-shot and sophisticated Korean dramas I've ever seen. It's about more than "cheating." It's about social status and corruption, what we sacrifice for priorities that weren't the keys to our fulfillment in the first place, and finding integrity in difficult situations.
Oh My Ghost - Netflix has a few Park Bo Young shows, but this is my favorite. It also has another of my faves Kim Seulgi. Romance between chefs and a ghost with unfinished business. Yes, there's a ghost, but overall the vibe is pretty playful. The two main women characters are irresistible, and the plot is solid.
Fight My Way - this is on Viki, but it's free to watch. You don't even need to log in, and you can use a browser with an ad-blocker. I have so much affection for this drama. There are some dark spots, but it's mostly a plucky, colorful, playful vibe. It's about 20-somethings trying to make it. The leads are an MMA fighter and a would-be broadcast announcer. They're two of my favorite actors Park Seo Joon and Kim Ji Won, and they're adorable in it.
I watched the first two eps. Definitely plan on catching up with this. It's on my list.