[Two female protagonists' growth direction/mother-daughter affection/some parental love scenes] Song Youqin, the future heir of the family who has been away from home for many years since childhood, returned to Zhouhai City where she lived when she was a child because of a special task. In the new work environment, she met Pei Yashan, a young new assistant. During the relationship, the two got a deeper understanding of each other with completely different personalities, temperaments, and family environments. Later, Youqin accepted the entrustment of a mysterious woman to participate in an experimental task about time and space travel. Yashan, who accidentally learned of this, volunteered to join the experiment and became Youqin's assistant in order to prove his ability and get to know his boss Youqin better. They successfully took the time machine improved by the laboratory and returned to the past, but due to mistakes they were unable to complete the task successfully and were stranded in the time and space of twenty years ago. They met young parents by accident...
