On her 12th birthday, Angele is infected with the strange and fatal disease that causes feathers to sprout from the body. She is sent to a solitary institution to be quarantined where she meets a man named Hakana and the wheels of fate begin to turn.  (Source: Mangaupdates)Based on the free game from Niconico. 

From Stage Storm:The story starts with a 5-year-old Lynn travelling with her Japanese mother to England to meet her father. On their way there Lynn and her mother get into a tragic car accident in which Lynn's mother dies. After getting out of the hospital Lynn moves to live in a manor owned by her father who is an English nobleman. The motherless little girl tries to adjust to high society life and get the approval of her elder step sister, Sara, whose mother has also passed away. At first Sara seems cold and distant towards her new younger sister, because she fears that Lynn's open and cheerful personality will win over the attention of their father as well as the handsome young man who lives nearby, but...

From Meisaku Translations:Lady Rin! is the sequel of the beloved Lady!! At more than 20 years after the completion of Lady!! Hanabusa sensei retakes the plot. Now Sarah and Arthur are married and Rin lives with them at the Marble Mansion, while the duke, Aunt Magdalene and Charles live in the Woburn castle. Rin has been formally presented and is now a member of England’s high society. She dreams to participate someday in the horse-riding Olympics at Victoria’s side. Well she also has some dreams that concern Edward. As ever her life is a bit complicated. Some new character appear several handsome guys that kind of fall for Rin and also some splendid girls who are wooing after Arthur and Edward. On the top of everything, a great aunt of Arthur and Edward comes from America and she dislikes Rin because of her origins.Will Rin succeed in becoming a gentle, strong and beautiful lady?

There my fiancé stood, gazing intently at my charming younger sister. When I saw them fall in love the moment they laid eyes on each other, I was hit with an overwhelming sense of déjà vu.Aah, again?  My fiancé had been in love with my younger sister even in my previous life.There was nothing I could do but watch it all unfold.And for some inexplicable reason, I’m the only one who keeps returning to that exact point in time.Trapped by fate.And yet, amidst the turns of the hourglass, I still find myself falling for him…Artist's twitter: https://twitter.com/pimashiro