What season is the cheapest to travel to Korea?

Spring and autumn in the peak season are very expensive and winter is very cheap. From July to August, there are many water parks in Korea, which are almost synonymous with summer countries. Not only college students like it, but also the water park is a good place for family, lovers and friends to get together and play. It is full of enthusiasm and romance, and you can enjoy the feeling of summer. How can you not go to the water park in summer?