Twenty-eight-year-old Yu Xueheng is gentle and calm, and has followed the rules for most of his life. However, due to the entrustment of his friends, he took on the important task of taking care of the 16-year-old girl Ye Langlang. At that time, Ye Langlang was in his cardamom years, with beautiful and smart eyebrows, a cunning and clever mind, and the innocence and innocence unique to a girl. When he broke into Yu Xueheng's life, he broke his original peace and stability. As a temporary guardian, Yu Xueheng was initially filled with the gentle care of an elder, patiently tolerating her escapades and taking care of her daily life. However, as they spent time together day and night, unspeakable affection gradually spread in his eyes, and that care was quietly mixed with tender concern that could not be hidden.