My Younger Sister Is Song Xianggong, Hegemon of the Spring and Autumn Period

In his previous life, Yu Tianle couldn't protect his younger sister. Then he transmigrated to the Spring and Autumn period. The girl who looks exactly like his sister is also his sister, but how could she be Song Xianggong, one of the era's leading rulers? To make up for the regret of his past life, Yu Tianle decides to use the identity of Gongzi Muyi to change his sister Song Xianggong's old-fashioned worldview. He doesn't care even if every female ruler of the Spring and Autumn period calls him a pervert, a creep, or a lecher!