Roaming the Martial World in Blue

My name is Shen Zhuying. I'm the second son of the Chancellor's household. I've been sickly since childhood, rarely leaving the inner courtyard. I have a younger twin sister named Shen Qingfu, who's always been getting into trouble and causing chaos. I've had to clean up after her more times than I can count. Last month, His Majesty arranged a royal marriage for her, promising her to the current Third Prince. But, get this: on the very day of the wedding, my sister left a note and eloped with her scoundrel lover, leaving the rest of us stunned.

My father pressed a hand to his forehead and said with a headache, "Take your sister's place and marry the Third Prince for now. We'll find her and switch you back."

I had no choice but to put on women's clothes again. My sister used to dress as a man and sneak out to have fun, often coaxing me into women's clothes so she could fool everyone. And now, on top of that, I have to marry in her place.

Who could have guessed she'd be gone for days? My father's heart was in turmoil, and I was left in bed with the Third Prince, both of us utterly at a loss.

The recipient can bear children and is intersex.

Theme: Little sister, you've really put me through the wringer.