Rainbow Sweetheart is a TV series directed by LinHeLong, a director in Taiwan; produced by ChaiZhiPing; starring by Jimmy Lin and YingCaier.

Xiao Han, who runs a small lodge, is the prettiest girl in the little village on Hainan Island. Her humble background and lowly education makes her unconfident, yet she is still optimistic, hoping for her very own happiness. Jie Luo is the haughty son of a woman who is in command of a big business group. He was asked by his mother to help her in renovating some parts of the island, and thus lived in Xiao Han's lodge. When Jie Luo was trying to purchase some land, he ran into problems which were soon solved with the help of Xiao Han. Their personalities are miles apart, but when they got to know each other through working together, they slowly fell in love. However, Jie Luo's mother was against them being together and wanted Xiao Han to leave Jie Luo in exchange for the continuation of the island's renovation project. For the good of the island, Xiao Han reluctantly agreed. This dealt a great blow to Jie Luo, and finding Xiao Han became his only job...

He Zhengyu, a cold and arrogant lawyer living in 2022, moves into an older apartment complex and discovers a strange time-space phenomenon that connects his apartment with the previous tenant from four months earlier in 2021. Every night from 10:06 to 10:52, He Zhengyu and Chen Jialan, the former tenant, become involuntary roommates. When He Zhengyu learns that Chen Jialan knows Jiang Shenghao, a person connected to one of his clients, he seeks her help. Together, they use the time-space anomaly to their advantage, hoping to alter events in 2021 and change the future.

A story about a forbidden romance that has weathered ten lifetimes and endured a thousand years of waiting.

The story revolves around youths with superpowers, and the challenges and problems they face after acquiring them. In overcoming these difficulties, they grow and mature along the way.