Kouri no Koutei no Musume wa Raku ja Nai

Princess Diamond, the princess of the Frieze Empire, was killed by the ice blade of her father, the emperor, on her 17th birthday. After that, the emperor held his daughter's corpse, and he destroyed the world by freezing it.

Anna, an office lady at a black company, was reading this novel with the tragic ending before going to bed. When she wakes up the next morning... she finds herself in the novel as Princess Diamond!? She knows her father is the ice emperor, feared as inhumane and ruthless. If they follow the original plot, he will eventually turn his murderous intent on his young daughter.

Diamond (Anna) thought, "At this rate, I'll be killed before my 17th birthday…"

Now as Princess Diamon...