Akira Akimoto, a 16-year-old girl with stunning beauty, was also the genius daughter of a priest in the human world. She was betrayed by the person she liked, so she gave up everything for his happiness, helped him eliminate the memory of her, and disappeared from his world (to be precise, she traveled through time, because it is very painful in the human world) , she has always sacrificed for others, but no one is willing to sacrifice for her---she is too good, and being with her is stressful!) It just consumes too much spiritual energy to help him erase his memory, so the time travel is not very accurate (it just ends up in a very strange place, occupying the body of the dead princess)
So... Her hurt and love happened here. . . .