Manga by author Ueda Rinko

Sometimes it seems like Usagi is hopeless. Sure, she's good with healing herbs, but she's the granddaughter of the leader of a prestigious ninja village and she's such a klutz that she's never made it out of the kiddie class. Finally frustrated with Usagi's lack of progress, her grandfather sends her to marry a local lord and have lots of ninja babies. But the lord has no interest in her or her child bearing potential! After years of goofing around, Usagi is finally determined to reach her goals - she's going to become a ninja and capture her true love's heart! Sequel to "Tsuki no Toiki" http://beta.mangafox.com/manga/tsuki_no_toiki/

From Viz: Poor Sumi Kitamura Her irresponsible older brother Eisuke keeps bringing home orphans for her to take care of even though they can barely afford their own basic needs! Just when Sumi's financial problems become dire, wealthy Soichiro Ashida enters her life with a bizarre proposition: he'll provide her with the money she so desperately needs if she agrees to marry him. But can Sumi fool high society into thinking she's a proper lady? Moreover, is it worth giving up everything for this sham of a marriage?

Ryo thinks she is a normal girl living a normal highschool life in modern day Tokyo. But is she? On a school trip, a mysterious man attacks her and claims that he is Benkei, the legendary warrior monk who collected 999 of his opponents' swords in battle during the Heinan era. And he also claims that she is Ushiwakamura, the 1000th opponent, that according to folklore, beat Benkei and became his master. But...Ushiwakamura was a man! And Benkei and Ushiwakamura existed in 13th century feudal Japan!

From Decadence: Spring of 1921 in the Taisho era, Ichijo Maria had lost her parents and entrusted herself to a friend's family. She leaves the house when the father became physical with her. Maria wanders the town and collapses in front of her old house. She is saved by a young doctor called Toudou Sei. There, she learns the house is currently being used as a dorm by the doctors of Imperial Maria Hospital. Remembering her fathers words, "I was tricked by Toudou!" she works there as a maid under a fake alias in order to reach the truth...