Niwa Daisuke
Niwa Daisuke is a 14-year-old boy who is, at a glance, a normal, kind, shy boy. On his 14th birthday, he discovers his fate as a male member of the Niwa family, which is to become a thief and steal priceless artifacts and artworks to seal the spirits inside. He also finds himself sharing his body with Dark, the legendary phantom thief who hasn’t been seen for forty years.He will turn into Dark whenever his ‘love DNA’ gets ‘excited’. Those kind of ‘butterfly’ feeling that you get when you get to see your ‘crush’, if you know what I mean. 
In this case, Daisuke gets ‘excited’ whenever he sees Harada Risa, his crush, either in person or in picture.
As the storyline goes on.. ermm.. okay I’m not going to spoil it for y’all, go watch it yourself!
