Yukari Kobayakawa, an accomplished author at the age of 17, writes with amazingly accurate details about historical Japan. It turns out he has the ability to travel back in time... to his past life as a renowned courtesan in the Edo period! As he goes back and forth between the past and present, he unravels the karmic relationship he has with his beautiful classmate Mahoro Tachibana... Satomi Katsuhiko enters Yukari's life when he needs a new housekeeper, but Yukari's devoted fan Mahoro Tachibana instantly hates him! The three's karmic relationship with each other begins to unravel, and things take an unexpected turn when the past seeps into the present!