An older-sister-type Queen of Qin? An energetic young New King? And a Yue King who works as a maid?
Ever since Ling Feng arrived in the Qin Dynasty due to a malfunctioning time machine, he discovered that this Qin timeline was all wrong. First, he met Qin Shi Huang Zheng Ying, but why was she an older woman? And hey, why are you, the transmigrator and Emperor Guangwu, here too? You're not supposed to show up until two hundred years later! And why are you girls, too? And you, Yue King, don't even get me started. Do you think disguising yourself as a maid to sneak into the Qin palace will let you assassinate the King of Qin?
Zheng Ying: I shall unite the six kingdoms and settle the eight corners of the world. The realm, and you, are both mine. Don't even think of escaping! (I swear to heaven, I absolutely won't run away!)
Transmigrator: Even if history is set in stone, I'll travel through time again and again, just to find the right you in the right time. And since time can be turned back, there's no problem with doing it many times in one night! (My kidneys can't take it!)
Yue King Maid: Hmph. I only lower myself to call you Master so I can endure hardship and bide my time. Once I have gathered my three thousand Yue soldiers, I'll take you back to Yue and have you serve me for the rest of your life! But, foolish Master, don't touch me there! (Is that your tsundere side acting up? Time to carry you to the ivory bed for treatment!)