So obviously everyone has probably already watched this except me (which is o.k. because sometimes I'm just slow), but just in case you haven't, check out the k-drama Soulmate at DramaFever (I love you btw) because it's got everything - sex, people throwing up, more sex, proposals on the subway, random cuteness, families on dates, and of course - more sex (well, at least the innuendo...).
And that's just in episode one.