Attention!：This work is translated by Google Translate for episode 1 to 3, and localized with INKR Studio and proofread by Japan Visualmedia Translation Academy for episode 4 and after.

Claire, a duke's daughter, gets killed by her younger brother Phil for being a "Night Witch", but for some reason wakes up alive. She's been sent back in time, and is 12 years old again!
In order to avoid her fate, she decides to do whatever it takes to win her brother's affection, hoping that will prevent him from killing her. Meeting him again, she realizes that he's as sweet and innocent as an angel!
Overwhelmed by his charm, she begins to dote on him as she strives to redo her life, but the question of succession in a great noble family and a civil war turn her life into chaos!