I Swear I Won't Bother You Again! (Manga) Vol. 1

Succumbing to long-simmering jealousy over her younger sister, noblewoman Violette snaps and does something terrible. As she languishes in prison, something unexpected happens: time is rewound, sending her back to the day she first met her sister! Armed with the memories of her disastrous first go-round, Violette is determined to take the script in a different direction this time.