Tensei Koukyuuden - Kodoku na Hime wa Koutei no Aishuu ni Oboreru

A story of love and revenge.

Princess Eisuiran, whose country was destroyed by Emperor Habongsetsu, took her own life in front of Habongsetsu in order not to be at the mercy of the invaders. ......, but when she woke up again, she was reborn in a peaceful life before the destruction of her country. The first time I saw him, I thought he was a good man.
Other than Suiran, no one remembers that prosperity was once destroyed. In order to take revenge on Tomoe Mineyuki, who took everything away from her, she married Tomoe in her second life using her own beauty, but there she found Mineyuki, who whispered sweet love to her even though he knew she was planning to assassinate him. He knows everything about Suiran, from her favorite foods to her hobbies, and loves her to the point of obsession.
This is a fantasy of love and revenge that unfolds in the Chinese imperial palace.