Tachibana Oreco

Oneshot story about an office worker and his Valentine's Day.

A romance story set in the Meiji era. Born into a prestigious family and blessed with good looks, Satoko is said to have a short life expectancy. But suddenly, her life is targeted by a mysterious killer...?! In order to survive on the spot, Satoko makes a "proposal" for the killer...?!On the surface, Satoko has it all she’s beautiful, the daughter of a nobleman, and at a prime age for marriage. Unfortunately, she is also quite ill and only has a short time left to live. Before she can secure a marriage that will redeem her worth in her family’s eyes, she finds herself the target of the mysterious assassin Shinpei, and her plans are put in jeopardy. In order to save herself, she makes a desperate proposal of marriage! When it comes to love, however, Shinpei takes “until death do we part” seriously.Alt. Official English: Viz

Side story to Hotaru no Yomeiri. Life between a guard and a young lady.

A married couple's love has cooled off, but just a few words might just change everything. (Source: Manga Updates)

Promise Cinderella's official spin-off depicting the daily life of the high school boy and the divorced young woman, half a year after the first chapter of the main series.

A retelling of the story of Tanabata, just that it doesn't follow the actual folklore and Orihime is a Tsundere.

Hayame leads a modest, peaceful life as a housewife. One day she meets a jackass student named Issei, but thinks little of it. As Hayame's life falls apart around her, Issei makes an unexpected proposal which will turn her life upside-down.“For me to have fallen this low at the age of 27... there has to be a reason for it. Happiness only exists because pain does too, after all.”Full-time housewife Hayame lives a simple and peaceful life. But when her husband suddenly asks for a divorce and her purse is stolen, she is forced to live on the streets without a penny to her name. In the midst of all this hardship, a rich and mean-spirited high school boy named Issei steps into her life. Her encounter with this guy soon turns her "peaceful" world upside down...Note: Chapters 53.5, 60.5, 65.5, 65.6, 65.7, 87.5, 87.6, 95.5, 108.5, and 111 through 116 have not been scanlated.