Is Cherry Blossoms After Winter Manhwa Based On A Novel?

I woke up inside a novel, and not even as an important character. I became a pretty background extra in a smut novel. My brother, however, was the only normal person in the entire story. His character setting was the one man the soft, delicate heroine could never win over. He was the cold, unattainable Prince Charming she could never conquer. When the heroine cried and confessed her love, he was studying. When she offered him her whole heart and body, he was busy starting a company. When she spiraled into scandals and nightlife, he was already a billionaire, calm and untouchable. I thought he would live a quiet, ascetic life forever. Until one night, I walked in on him at midnight… holding a piece of clothing I recognized all too well, murmuring a name over and over, a name so familiar that my scalp tingled.

In Gangnam, Seoul's district known for it's wealth and glamour, a series of mysterious disappearances and brutal murders occurs. The criminal is quickly called by public the 'Cherry Blossom Reaper' because of his choice for young, beautiful women and fact, that the day after the kidnapping, in the place of the disappearance, he leaves a small bouquet made of artificial cherry blossoms, slightly sprinkled with the victim's blood. When the daughter of the well-known fashion house CEO disappear, the case is transferred to Kim Soo Min, a female detective from Seoul's Investigation Departament. But as it turns out, the case is not easy to solve, even for such a talented detective as her. The list of suspects is getting longer and evidence does not clearly indicate any of them. [ IMPORTANT: This story is entirely fictional, just like its characters. Any resemblance to real people or events is purely coincidental. ]

One accident led to An Xin waking up in the body of her best friend. The once domineering Miss An was now suddenly the gentle Madam Ye, but this does not mean that she is without thorns. The first thing to solve, is this cold and unapproachable husband of hers that makes her pity her best friend. At the same time, perhaps squeeze a pretty penny off some hustle, and save up so she can travel. Perhaps she will find a few hunks on the way and her newfound life would not be boring at all. But wait, why is the once unapproachable husband suddenly so clingy? Good sir, I am not your wife, and marrying me is impossible. Unless...you promise to spoil me for the rest of my life, love me like nothing else, and to and over all your wealth and influence, and to be content coming home to do the chores and cook for me everyday. Perhaps then, I would sit on the couch and cheer you on!

At my graduation ceremony, I finally gathered the courage to confess my feelings to my longtime crush. But before I could, I was hit by a car. When I opened my eyes again, he was standing right in front of me with a frigid glare. "You're awake? Perfect. Then let's discuss our divorce." I blinked at him, completely dazed. Divorce? Wait—what? I hadn't even confessed yet. How on earth had this turned into a divorce?

My childhood sweetheart hated me for tearing him away from the Beta's daughter, and he hated that my father was the pack's Alpha. My father not only sent the woman my childhood sweetheart loved off to another pack to be their Luna, he even refused to let him reject the mate bond that tied us together. For seven years after the marking, he wept every single night. "The North is bitter and brutal. How will Gianna ever survive there?" But to me, the woman he lived beside every day, he had only this to say. "Why did the Moon Goddess bind us together? I don't care about Alpha blood at all..." "If I could, I'd wish I had never met you!" Every night we shared one bed, yet our hearts felt miles apart. For Gianna's sake, he fought against the pull of fate itself. But the day the vampires attacked the pack, he shielded me behind him. Claws tore through fur, fangs sank into his forearm, and a cold silver dagger buried itself in his heart. His scalding blood splashed across me. I tried to drag him to the statue of the Moon Goddess, but he shoved me away without a moment's hesitation. "I've already failed the woman I love in this life. I won't fail the pack too." "Matilda, the bond between us is finally broken. In the next life, may we each get what we truly want..." With that, his wolf faded into nothing. The pack was destroyed, and I would not go on living in a world without it. That day I cut out my own heart with a silver blade, and as the Alpha's daughter, I shielded the pack's people with my last breath. When I opened my eyes again, I was back on the day they chose who would be sent north to marry. "Father, I'm willing to go to the North and become the Luna of its Alpha." This time, I'll let them have their happiness, and I'll claim my own!

What happens when the tormented female lead in a novel wakes up and decides to get together with the second male lead? Coincidentally enough, I'm transmigrated into the body of this tormented female lead!