One day, Mimi, who is living part-time with no luck in her career, is asked to do a special job by her cousin. By investigating evidence of an affair by Seisuke, the handsome president of a famous company...!? Seisuke is sloppy with women and is rumored to be a married woman killer. Mimi ends up using a fake name and pretending to be a married woman to infiltrate the company. Seisuke approaches her, whether she knows his purpose or not...!? Watching the two of them explore each other is sure to keep your heart pounding! An adult love that begins with a lie - begins here!

Momoha is looked out for by her childhood friend, Hakuba, who is known as the perfect prince. After a certain incident, she becomes aware of Hakuba, but when Momoha tries to confess her feelings to him, something strange happens to Hakuba... (Source: Flower Comics, translated)

https://www.cmoa.jp/title/312990/

Mei lost her mother, dumped by her boyfriend...and stabbed by a mysterious sword that fell from the sky. She thought she died, but when she opened her eyes, she was in another world. A world she had seen in the textbooks she was using to teach her students at cram school...ancient China. Everyone calls her "The War God Mei" and looks like she has to save the country by fighting the war! Mei decides to act like the War God, but the beautiful general who came to pick her up looks suspicious... (Source: MangaPlaza)

Lumina Raymond, the daughter of a fallen noble house, is ready to throw away her happiness to save her family. With her older brother bedridden and her estate in shambles, she agrees to a desperate engagement with Marquis Lugol Carious. But her life is upended when a letter arrives from her future self, written one year in the future. The message is a warning, her brother will die, and her life will end in total ruin. According to the letter, there is only one path to salvation—she must choose the man she once turned down, the "Cold-Blooded Duke," Lian Leidlant. With her future on the line, Lumina marches right up to the notorious "Cold-Blooded Duke" to say the words that will change everything: "I choose to marry you after all!" [Original Webtoon](https://dbook.docomo.ne.jp/item/1082d5d7692c26d46766ac5bd5261a725e570ae0fec817094e60b46003d74fad/2000/)