As for "regular" length dramas, The Reply Series (probably '94 is best with this), Coffee Prince, and Secret Love Affair are ones I recommend, not just for the kisses, but realistic depiction of skinship~ in relationships. But, tbh, my favs for this are longer dramas wherein couples usually get further than just dating (actually in the former two mentioned above the otps marry but not much of after-married life is shown so), and thus have more instances for kisses/skinship: Glorious Day, Heard It Through The Grapevine (I honestly rec this one so much, one of the best dramas ever imo), ummm What Happens To My Family, Ugly Alert......etc.