The story revolves around cold and icy "male god" professor Zhang Sinian and the calm and sunny Yun Shu.

One day, Nozomi Kuroda finds a love letter in her desk from the most popular boy at school, Jun Setoyama. Though embarrassed and puzzled, a secret exchange diary between the two begins when she puts her reply in the shoebox.

With only a year left to live, 17-year-old Akito finds new meaning in life by bringing joy to a terminally ill girl who has just six months remaining.

Choi Seung Hyo is the most noteworthy young architect in Korea, and he runs the architecture atelier "In." Not only is he nearly perfect as an architect, but he is also very attractive and has a great personality. Yet, Choi Seung Hyo has experienced moments that he wants to erase from his life. Those moments usually involve Bae Seok Ryu. When they were 4 years old, their moms became friends. Because of their moms, Choi Seung Hyo and Bae Seok Ryu spent a lot of time together, bathing together at a womens bathhouse. Now, Choi Seung Hyo meets Bae Seok Ryu as an adult. While growing up, Bae Seok Ryus life was smooth sailing. During her school days, she never missed ranking first academically at her school. She was always passionate and energetic in the things she did. After graduating from university, she was hired by a large company. She worked hard as a project manager, but for some reason, she quit her job. She has been unemployed since then. She meets Choi Seung Hyo. Written by Namuwiki

Two high schoolers start out antagonistic but begrudgingly become closer. The story spans through years and shows the growth of them as individuals and the and the effects this has on their relationship with each other.