Love is Sweet is really enjoyable. It's long, so there's several narrative arcs - I watched it in four chunks, I believe. The leads were marvelous, as were many of the support characters (esp Du Lei and Qiao Na, who broke the love rival tropes well). I did find the second leads' story less exciting, but not bad in a way. My favourite thing was that the two leads had interesting relationship wasn't resolved at the last minute - it formed, grew, and strengthened through the story. Enjoy!