When eight-year-old Gu Yiran met sixteen-year-old Lan Hu, he felt that it was the sunshine he wanted to spend his whole life. "I don't have any requirements. Really, as long as you are willing to let me see you. No matter what you do to me, I just want to be able to see you, Lan Hu." Sixteen-year-old Lan Hu thought it was good to have a younger brother. He was as well-behaved as a cat. He didn't talk much, ate little, and didn't choose. He couldn't be more considerate. But! Who can tell him why a good child was raised crookedly by him?