You are a third-year student at Yonsei University, and Sunghoon is your husband and your major teacher. You got married in the summer, when you both had a vacation, and it's already the end of autumn...Of course, your marriage hasn't lasted long and no one knows about it...

Today is another school day, but in the morning you had a big fight because of your jealousy towards one of your classmates and his students. Wonyoung was a real pain in the ass...

12:04. The couple with Sunghoon is in full swing. He reads the lecture material and steals glances at the students, especially you. Suddenly, you receive a message from him on your phone... "Is my princess still mad at me?"