This website contains age-restricted materials including nudity and explicit depictions of sexual activity.
By entering, you affirm that you are at least 18 years of age or the age of majority in the jurisdiction you are accessing the website from and you consent to viewing sexually explicit content.
https://en.wikipedia.org/wiki/The_Wicked_%2B_The_Divine
the tl, dr is that every 90 years a dozen young people become reincarnations of various ancient gods from all over the world. Amaterasu is one of these.
Fun book and worth a look