Jang Dan-Bi is a high school student. She sucks at mathematics lessons. She was also unprepared and feeling depressed when she was about to face the CSAT university entrance exam. One day, when it was raining, she escaped from the exam room and entered a puddle that connected her to the world of the Joseon Kingdom era. There she met Lee-Do. Lee-Do was a king of Joseon at that time.
Diary-Stories 