Eren Yeager's Wife's Manga

She was not only reincarnated into someone who died in an absurd fashion, but she also took the crown prince’s place and went to a secret neutral territory, where male members of the five imperial families gathered. As a result, her childhood friends know her as a boy but she would never meet again because officially, 'the prince' was going to die soon! After many years, her childhood friends, turned heroes after defeating the wild dragon, visited her thinking she was the one who killed their friend not recognizing her at all.

One day, Dongbaek woke up to find herself much younger in a unfamiliar place. She was living the life of an ordinary college student, but she had fallen into the Three Kingdoms period because of a crow named Zhao. In an era where it is difficult for women to even survive, she decides to cross-dress and becomes the adopted son of the powerful enuch Zhang Yang, initiating her project to survive such turbulent times.

Chosen by the last remaining Seabird, Lott has been cursed with a target on her back. After the notorious Woohoppiage pirates pillage her village and kidnap her sister, she embarks on a perilous journey to get her back. And she’ll do whatever it takes to make that happen, even if that means joining the Black Ocean crew and pretending to be a man. But she's not the only one with a secret on this pirate ship…

She reincarnated in the body of a maid who gave her heart and body to the villain Duke, doomed to die while under his service. Roselia, originally a maid of the Duke's family, is destined to be found and executed by the male lead, the Crown Prince Klaus, after being used as a chess piece. Hoping to avoid the grim fate that awaits her, she dresses up as a man to evade his attention. But why did she become a servant after avoiding becoming a maid to the Duchy?

Delma and Louise were born as twin daughters of the famous Praetoria family, but needing a son to inherit the position as marquis, Del is raised as a man by her mother whilst neglecting the other twin. As she endures the position as heir, their mother plans to get rid of her and establish a real man as the marquis, through her sister’s arranged marriage but not before a dragon, an ancient being, appeared before them with a contract as salvation...