She is the humblest princess in heaven, and she was born to prove a mistake.
He is the sharpest young master in the demon world, and he sneaked into heaven just for a long-planned deception.
Deep in the sea of clouds, two people with unknown identities stole a time as pure as glass. He taught her to resist, and she gave him warmth. Until he stole the treasure and left, the flame mark became the only burn mark on her heart, and she was thrown into the mortal world, experiencing seven love tribulations, meeting "him" in every life, and never ending up well in every life.
In the seventh life, the sky is full of war. The seriously injured Demon Lord fell in front of her formation, and the familiar mark revealed the blood-stained memory. The soldiers of the three realms pointed at him, his sword, her gun, finally pointed at the common destiny.
When the true form of the treasure appeared from her soul, they realized that this encounter that started as a conspiracy was actually the most affectionate game written in ancient times.