I Mistook the Possessive Prince for a Girl Who Needed Spoiling

[Next BL Novel] Yan Shen transmigrates into the body of the Great Yan dynasty's pampered Seventh Prince. The first thing he does is search for the younger sister who once depended on him for everything. His frail little sister died of illness before she could enjoy much of life, and the regret of failing her is his greatest sorrow. His search turns up nothing. Then one day, he happens upon a boy collapsed in the snow, curled up from the cold. A palace attendant tells him the boy is His Majesty's youngest prince, the remnant of a former dynasty's princess. Born of lowly, illegitimate blood, he has been bullied for over a decade in the depths of the palace. Their eyes meet. Beneath the boy's dark lashes, his eyes are black and brooding, filled with a beastlike thirst for blood. He presses snow against his severed arm and grits his teeth through the pain. A blood-red teardrop mole rests at the corner of his eye, accenting his breathtaking beauty. His shoulders are torn open from the lashes, and a corner of a plum blossom birthmark is faintly visible. Although the boy looks nothing like his sister, the birthmark on his shoulder is exactly the same. What a cruel twist: his sister has been reborn as a boy! Under pressure from the Eastern Palace, Yan Shen takes his "sister" back with him. He lavishes him with fine clothes and food, gives him a colored-glass lamp, helps him put on his shoes and socks, tends to his wounds, and forbids anyone from bullying him again. When the other princes make things difficult for him, Yan Shen grits his teeth and takes the blows in his place. A girl deserves to be cherished. As long as he remains in the spotlight, he will protect "her." But six months later, he discovers the same mark on the back of the newborn princess's neck in the imperial palace. ...Only then does he learn that the Ninth Prince's plum blossom mark came from being burned as a child by his deranged birth mother, and has absolutely nothing to do with his sister! He raised the wrong person, and raised a menace. After Yan Shen leaves with his real sister, terrified out of his wits, the "sister" who usually wears white and pretends to be a pale, tearful damsel suddenly sheds his former meekness. Dressed in black, he seizes the throne and, with thousands of troops at his back, comes after him with ruthless efficiency. The Ninth Prince reveals his wolfish ambition and sinister side. His armies surround the city. Looking up at the tower, beneath the golden banners, his devastatingly handsome face smiles as he calls Yan Shen "Brother." "Brother, give yourself to me, and I'll end the war." * Yan Tingshuang thought his life would always be miserable, his fate unchangeable. Then, one year, a colored-glass lamp emerged from behind a screen. His Seventh Imperial Brother took his hand and placed it in a gilt purple incense burner to warm it, then asked with concern, "In this life, would you like us to depend on each other?" If that is so, then let us depend on each other in life and death, and travel the same road in this world and the next. Straight-laced, handsome, captivating bottom × green-tea, yandere ghost top Their relationship begins when they are over seventeen, and there is no intimacy before adulthood. They are not related by blood, and the top has a different background. Thanks to "Jing Men Yan" and "Tang Luo" for suggesting the title! Theme: No matter what hardship you face, you should stay positive.