Manga adaptation of Robert Louis Stevenson's 1886 work "Strange Case of Dr Jekyll and Mr Hyde."

Tired of the fashionable romantic idealism of “love above all,” Christine decides to marry Leon, the notoriously workaholic High Chancellor, on the condition they remain a marriage of convenience. Three years later, disguised under a secret alias, Christine works tirelessly as an ordinary civil servant at a job she loved. Until she got promoted, and her new boss turns out to be… her husband!? She found herself conflicted between the joy of professional recognition and the frustration of him not recognizing his own wife— “Here, please enjoy this dessert.” Swept up by his sweet, tender attention, maybe her secret identity isn't so secret!? A story about being doted on at work, a secret hidden behind a contract marriage! (Source: Beans Bunko, translated)

The protagonist suddenly realizes she’s been reincarnated as Natasha, the villainess of a novel! If the story follows its original course, her fiancé will break off their engagement and she’ll be sent to a brothel. …Even though she’s terrified, this fate seems impossible to escape. “In that case… I might as well become a high-class courtesan!” Determined to face the doom ahead, Natasha devotes herself to polishing her manners, education, and artistic skills. The only thing she’s still missing is actual experience. And when she finally heads to the brothel, waiting for her is the owner who begins giving her seductive “night lessons”! His gentle instruction sends her heart racing nonstop… The beginning of an unexpected romance! https://www.cmoa.jp/title/332907/

Set 100 years into the past of the My-Otome anime.

Romane is a sixth-grader who is given a magical padlock necklace by an injured woman at the end of an alley. Once she puts the necklace around her neck, she can talk to birds and, most importantly, see the “emotis”—creatures made of emotions that threaten the town of Saint-Louis-de-la-Montagne. It features magical powers, epic battles, great friendships, and even a little romance!