Daisuke Niwa is an ordinary, if slightly unlucky, middle school student. On his fourteenth birthday, he comes down with a 'condition' that has plagued the men in his family for three hundred years. When he sees his crush, Risa, he transforms into his alter ego, the phantom thief Dark. Unfortunately, when Dark sees his crush, Risa's twin Riku, he transforms back into Daisuke. The only cure for this craziness is if Daisuke can get Risa to fall in love with him and Dark can get Riku to fall in love with him. But that's going to be a problem, seeing that Riku hates Dark and Risa loves him.
Maseong is a celebrity magician with a profound secret: he can actually move things with his mind! When he runs into a mysterious young woman with amnesia claiming to know him from a past life, Maseong’s existence is upended. Cheondong seems to attract attention wherever she goes, including that of Maseong’s charismatic (but maybe evil) boss, Phillip, and Phillip’s lecherous half-brother, Pilyeong. Who is Cheondong, why does she know so much about Maseong, and will they be able to work through more than five centuries of baggage and just fall in love already?