The Change Of Season summary: To have Gyu-young, a woman who keeps appearing in his dreams, Yong-geon sets a trap. " If you don't mind, you can use me ''. Yong-geon whispered to Gyu-young who is heartbroken by her friend and cheating fiance , to use him to get revenge. Gyu-young is shaken by Yoon Geon's sweet proposal and the relationship deepens.