[Crossover] The Villainous Career of a Young Lady

Da Daoji Mirai died at the age of twenty-five, the most beautiful time of her life, before she could become a Reiwa-era songstress. Her conglomerate went bankrupt, her family was wiped out, and Akashi Seijuro, the husband she had loved for years, threw her out onto the street. When flames swallowed her parents and their mansion, and her twin sister, Da Daoji Tomoyo, died before her eyes, her overwhelming pain and fierce desire for revenge summoned the demon Fyodor D. Unlike the hideous creature she had imagined, the demon had refined features and gently reached out a slender hand, cool as jade, to pull her from the pool of blood. And so she loaded a save and started over, returning to a day when she was three years old. Black Rose Mirai Phantomhive, the next heir to the Phantomhive family, known as the young lady of the underworld. Her abilities are unknown. Rumor has it that she is ruthless, and countless people have died at her hands. *Reading Guide* - This is a writing exercise, and the prose is still rather immature. If it bothers you, please don't complain in the comments. Thank you for understanding~ - A crossover of Bungo Stray Dogs, The Prince of Tennis, Kuroko's Basketball, Ouran High School Host Club, K, La Corda d'Oro, and more. - The main male characters appearing so far include: A certain phantom thief, a certain suicide fanatic, a certain kind Russian, a certain rich young master, a certain captain, and others. - The worldbuilding and some characters' identities are the author's whimsical inventions. The logic may fall apart, so please don't scrutinize it too closely. A satisfying, idealized heroine, loved by everyone (not really). The heroine is a seductive femme fatale and no good person. If you have a cleanliness obsession, please steer clear. Theme: Redemption and growth