Travel Through Time and Meet Him

The male protagonist comes from the past, and the female protagonist comes from the future. The male protagonist is walking on the street, and a girl in red falls from the sky. The two meet and fall in love. The novel has three major chapters: childhood, encounter, and time travel. It might be confusing at first, but it's really fun. This is really a time-travel novel, please read to the end. This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.