Let's start from the good things. I loved the actors. They created every character in a credible way - including the characters that weren't all that well written. This applies of course to the main leads, with their contrasting personalities, the sister, hysterical and bitchy, the rich friends, spoiled and vain, as well as the thief, smoothly manipulating his a** out of troubles. I would also like to mention the mother character: she is just there, looking elegant, watching soap operas, enjoying her son-in-law's cooking, and never causing unneeded drama. Way to live!
The romance between the main leads was shown perfectly, taking the censorship into consideration. Watching those two mess with each other and care for each other all the time was pure pleasure. The way Gong Jun's character teases his bf, takes money out of his pocket because he knows he can, and simply moves in at some point is cute and hilarious at the same time.
Here the good things end and I need to talk about the plot. Starting from the premise, where a dude agrees to hit on another dude in the name of his younger sister, the whole story is absurd. The characters' actions are sometimes weird or stupid, or even plain criminal, but they don't get called out on this. And don't even get me started about the ending. Construction workers need a rich boy's help? Really? And then leave him in the well to freeze? Really, really? It's a pity, because with a story less offensive to reason, this could really be a great series.