First of all if you are unaware this is the 7th season of the Zhong Ji series aka KO Series. Now you don't really have to see the other seasons, because it's like a show of it's own, but it would be a could idea to watch the other seasons to get the inside jokes and some familiar faces. But i advise to watch the other ones because overall this series is really fun and different. You can watch the early days of Fahrenheit from the first season KO One to the first appearance of SpeXial members in KO one 2, up to this one that features members of SpeXial and members of the girl group A'N'D. I loved seeing familiar faces and a different side of them from their previous roles, and getting to know new faces. It will make you laugh and cry and keep you guessing. You will think that you have it all figured out but wont until the very end. One of the better ones you will not be disappointed.