Cheng Shuxing, a ten-year-old boy, once entered the house of his neighbor, Xia You, a seventeen-year-old boy, without his key. The child's parents are busy with work and have no time to take care of the child, so Xia You comes to take care of them. Xia You lives alone and has no one to accompany him, so he has his children to accompany him. Two boring people are not boring when they are together. The little things in life become warm because of you, and the love between the two gradually grows.