After Yuan Jing got drunk, she accidentally became the "cousin" and life assistant of Meng Zige, a child who was six years younger than herself. She also wanted to "sleep with her!"
Under Yuan Jing's "sleeping company", Meng Zige gradually recovered from his severe insomnia and mild depression. Many twists and turns and interesting stories happened during the three years they got together. Gradually, Meng Zige fell in love with the girl who had accompanied him to grow up and was six years older than him.