몇 번의 연애 끝에 노트에 숨겨진 법칙들을 알게 된 희수. 여기서 그만둬야 한다는 걸 알지만, 처음으로 사랑받는 행복을 알게 된 희수는 다시 노트에 이름을 쓴다.
Gang-wook suddenly becomes aggressive and breaks up with Hee-soo. Shocked by this sudden disaster, Hee-soo finds out that the relationship came from the power of the notebook. She studies how to use it and starts dating anyone she wants just for a month each. Si-ho is worried that she may never find true love.
