Twinkling Watermelon is a time-travel. I highly recommend this drama. If you find it boring from the beginning, I assure you that you will love the turn of events on the later episodes. It's so youthful drama and you can learn so many things. The friendship, father and son character are so realistic. Mostly the father and son character are my favorites among the other characters. One of the best time-travel Korean drama in 2023.