If I’m not already too late:
Book:
Is there an ebook available?: Yes
Is there an audiobook available?: Yes (available on Audible Japan)
Is there an all-furigana version available?: Yes
Summary - Japanese
大国ティアムーン帝国のわがまま姫ミーアは、民衆の怒りによって断頭台に送られ、処刑されてしまう。
しかし、気がつくと彼女は12歳の頃に逆戻りしていた。
ギロチンの恐怖を思い出したミーアは、同じ運命を回避するために行動を開始する。
保身第一のはずが、なぜか周囲からは聖女のように勘違いされていき――?
これは、ポンコツ姫のやり直し逆転ストーリー。
Summary - English
After being executed during a revolution, the selfish princess Mia of the Tearmoon Empire suddenly finds herself back in her 12-year-old body.
Determined to avoid her grim fate, she begins making changes to secure her own survival.
However, her self-serving actions are repeatedly misunderstood as acts of great wisdom and compassion, earning her an unexpected reputation as a saint.
A comedic time-loop story of misunderstanding, redemption, and second chances.
Content warnings if known
References to execution (guillotine) and political unrest/revolution.
Generally light in tone despite these elements.
Why are you nominating this book:
It has a really clear and engaging plot thanks to the time-loop setup, and the misunderstanding comedy makes it fun without being hard to follow. It seems like a good balance of lighthearted and plot-driven. Also, I enjoyed the anime.
And just a note on the top review by The_Southern_Cross. They said that it’s reincarnation, but it’s not, it’s regression. It’s not isekai.