A night of recklessness — Song Yihuan was framed by her eldest sister and turned into a tool for bearing a child. No one in the world knew that by day the eldest sister and the Ning Prince's heir, Ji Lingchuan, appeared perfectly harmonious; by night, it was Song Yihuan who took her sister’s place and spent the nights pleasing him. Song Yihuan believed that as long as she successfully gave birth, she would be free forever. But at the moment of childbirth, her eldest sister tore off her hypocritical mask and intended to dispose of the mother and keep the child, eliminating all traces. The man who had been so tender to her at night grew to loathe her deeply. "Song Yihuan, a woman as frivolous, base, sly, and deceitful as you is not even fit to be my concubine." Later, Ji Lingchuan regretted it. Blocking that familiar figure at the border with soldiers, the Ning Prince's heir — always stern and aloof in the eyes of the world — threw off social decorum, pulled the woman tightly into his arms, his eyes rimmed red and his voice hoarse: "Yihuan, come home with me. Don’t ever leave me again." Song Yihuan sneered, "Sorry. I, Song Yihuan, would rather be the wife of a poor household than a concubine in a noble house." CP attributes: beautiful and dazzling, delicate and soft-bodied, scheming illegitimate daughter vs composed, cold, eight‑pack‑abs, extremely jealous heir [Both chaste + pure historical romance + revenge + mutual teasing + match made in heaven + mutual secret crush + husband‑chases‑wife (male’s remorse) trope]