When I watched the first episode, I straight away thought "this is the most laugh-out-loud funniest show I've seen in a long time". And the first half of this drama really was hilarious. The characters are crazy and delusional and strange, and none of them are particularly nice but you somehow like watching them anyway. Plus, they actually have some proper makeout scenes, which is so very rare in a Korean drama. As other reviewers have said, it starts getting more serious and losing the humour as the drama goes on, and it loses some of the shock factor as well. But it's still enjoyable for the most part. The acting of all concerned was fine. Jinyoung surprised me, I wasn't sure he could actually act. But nope, he was great. Now, technically, this drama was all over the place. The editing was jumpy, there were odd time skips, they would randomly drop plot points, characters would just change their minds about things without actually showing the audience why or when that happened... But they are all things that you just come to accept with this show. It's not perfect, but it's very funny and sweet, and well worth watching.