The Dark Sisters Who Traveled Through Time

They were ordinary junior high school students who traveled through time and became the daughters of the prime minister. After being forced to jump off a cliff, they were rescued by an outsider and then accepted as his disciples by the outsider. They became the boss of the underworld. After returning home, they were sent to the palace and the love story of the emperor and the prince. This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.