Unlike Gi-hoon, who is happy running a noodle shop with his mother in their hometown, Ji-eun distances herself from her family due to her ambition to succeed as an idol singer. The siblings, who have been hurting each other more than showing love, find their conflict deepening with the news of their mother's Alzheimer's, whom they thought would stay young forever.

Prospective writer Aeng-Doo lives with So-Young, Yoon-Jin and Na-Eun. Aeng-Doo and her 3 friends do not have much in common except that they all don't have boyfriends. One day, Aeng-Doo happens to find a rejected work from an annual spring literary contest on the street. Since then, the lives of Aeng-Doo and her 3 friends begin to slowly change.

Dali, Ju-young, and Yeon-woo are high school classmates. Quite late at night, the three of them are talking about another classmate called Sun-hee while waiting for a bus. They eventually find out that each of them had a strange and weird memory related to Sun-hee...