I was really emotional when I reached the end. All the characters: Hee-do, Yijin, Yurim, Seungwan and Jiwoong each face their own problems in the k-drama which I admire. They all through challenges of finishing school and of course, love. I really admired the story as I watched over the weeks. All the funny scenes made me relate to my own life. Watching Twenty Five Twenty One has taught me life lessons. I won't forget the cute scenes between Hee-do and Yijin, even though they have the 4 year gap. This k-drama also includes the struggles of Koreans financially and it has taught me what it is like to have few money.