Okay so i bet everyone has noticed in ep1 that this isnt a continuation of S1 HOWEVER,

Yes its a different plot for the villains but the main 3 couples (Ling boss, wen li and chuyan) still have the small little details from season 1. Like the drunk driving, contract marriage, pi dan (doggo), the swimming pool thing and all the other small little things.
From this drama, it is super obvious that their chemistry is way better than season 1 and that this season is as funny or even slightly funnier than season 1. the ONLY thing that is lacking is the plot for the bad guys. Jiang jie did almost nothing but childish acts to destroy ling yi zhou via xialin and soon enough shes out of the game. then fu weining... all he does is says that the weather is hot 24/7 and ends up locking them in a cooler warehouse.. and end of story for the bad guys. Unlike season 1 where the little girl and the half brother of ling yi zhou scheming with xialin's new assistant, season 2 is just 2 people tryna destroy them and almost passing the 'bad guy' plot..
Anyways, the theme song is the same. Only 1 or 2 songs are introduced in season 2 and the ending is short but satisfying.
Worth the watch, most likely gonna watch again!