Lee Serin is a volunteer at her school library and works for a couple hours two times per week. One day the library receives another volunteer in the form of Jeon Jungkook, the most desired boy on campus. 

Nam Ilyeon has always admired the prince of the school- Jeon Jungkook. The thing is, she was always too shy to strike up a conversation with him and he always seemed to be surrounded by people beyond her league. When she is supposed to receive tutoring from Kim Namjoon, the head of Class 3-1, she somehow winds up with Jeon Jungkook as her teacher. 

Lee Jungeun is an earnest and hardworking 17-year-old. After her parents' divorce, she moves to Seoul with her dad and begins a new life. She befriends a girl named Seo Woomi and starts to adapt to her new environment. Lee Jungeun goes with Seo Woomi to pick her drunk brother up and they end up encountering a group of gangsters who try to mess with Woomi's brother. But when one of them falls for her, what will she do? 

In a world with no emotion, Seo Riyeon fights to find meaning in her life. As the only person who can feel, she tries to seek comfort but fails, as everything around her is "dead." She comes across Jeon Jungkook, who is also a "feeler" like her. Can the two ever find love in the world?