[Not historical canon, so just enjoy it!]
[No CP + parallel-world Great Qin + some history, but not much + raising kids + transmigration + invincible protagonist + mindless fun]
“Zheng’er, call me Elder Sister, and I’ll come down the mountain with you to pacify the warring states and unite the four seas.”
“Zheng’er, I steadied the court for you and shielded you from countless accusations. Surely that great service deserves one ‘Elder Sister’ in return?”
“Zheng’er, I conquered the toughest territory, Jingchu, for you, but I still can’t get you to call me Elder Sister.”
“Zheng’er, I raised two generations of rulers who kept the realm stable and put an end to brothers killing brothers. Surely that deserves an ‘Elder Sister’?”
“Zheng’er, call me Elder Sister, and I’ll have no regrets in this life.”
“Brother Zheng, I almost got to hear you call me Elder Sister. But the realm is at peace now, and I can’t complain about how things turned out…”