Huang Zitao was an authism patient. He was 21 years old. He lived with his beautiful mother, Zhang Li Yin. They lived together in a simple house. Zhang Li Yin was a housewife. His husband, Huang Taozi, left them alone when he knew he had an authism son. Zhang Li Yin was a jobless. She only rented rooms for people who worked or studied near her house.

It was, Wu Yifan, a student college who rented the rooms from Li Yin. Wu Yifan was a kind boy. He was 25. He always payed the rent on time and he cared about Li Yin's son, Huang Zitao. If Yifan had a spare time, he always played with Tao, talked with Tao or watched the stars on the night sky. Yifan was really really kind and care to Tao. And Tao loved Yifan. Li Yin who noticed that his son was in love with Yifan, was sad. Because she knew that Yifan wouldn't loved him the same as Tao loved Yifan.

And the problems were increasing when Xi Luhan, Zitao's older brother came to the house after 4 years in Seoul. Luhan really missed his mother and his brother. When he saw Yifan, he knew he was in love with Yifan.

Who will Yifan choose? Tao or Luhan? Will Luhan give in for his brother? Or is it Tao who have to recieve the reality that Yifan isn't for him?