She once traveled through time and space to protect the ignorant boy, but now Zhan Jiaqi, with deep obsession, silently protects her who has lost her memory with her immature body. The daily companionship at the alley, holding an umbrella together on rainy days, and the warm comfort when she was frustrated, her little figure became the light in her dark time. Time and space flow, identities are exchanged, forgotten memories have not yet returned, and care and protection across the years have never stopped. A two-way love in time and space continues quietly in the company day and night.