This manga is actually about 1 year and a half old but I found it kinda cool and they are very long chapter about three times as much as most are. It starts out talking about a legendary phantom art thief who has never had his identity revealed but goes by the name Dark. After this you see a girl give a boy named Daisuke his love letter back. which obviously bums him out especially since it is his 14th birthday and hes been rejected on it.
So for the rest of the school day he is really bummed out and his friends cant even get his attention when right in front of him. Then his really abusive friend beats him up to help him wake up, isn't that smart. Which does get him up and moving but still kinda down then the kid tells Daisuke that he got a tip from hid dad that something is going down at the museum that night at 11 o clock sharp, he also states he is a reporter and wants to get in on this story. So he uses this as an excuse to go have Daisuke do something for him in the art room while he takes off.
So being totally used he goes down to the art room to find his card is the wrong one and he can't get in. Just then a guy comes by who is apparently very smart and to him self and takes allot of notes. His name is Satoshi, Daisuke apologizes for not having the right card to open the door but says he can open it and he does which startles Satoshi since the lock is very expensive and rare. Daisuke tells him that oddly enough he has one at home and then feels stupid for sharing about his really weird family to someone.
Then you see him very maneuver ably have to break into his house which has tripwires and a pit, very odd. Then at the end his mom greets him home and tells him that she and his grandpa have something to tell him since he is 14 now and that he did a good job today getting in. Though he doesn't seem to care since he had a bad day and goes up to his room where he thinks about how Risa had turned him down that day.
Then out of nowhere he hears a voice and realizes fast its coming from inside him then he transforms into a much taller and slick haired guy. He runs down stairs frantically and tells his mom who doesn't seem to be surprised but happy about it. She then tells him its in their family's blood and his grandpa use to have it too, she also tells him that he is Dark the Phantom art thief which annoys him. She tells him that the only way to change back is to steal a piece of art called the "saint of tears sacred maiden statue" at 11 o clock at the museum. Then she explain that their pet can also transform and has helped dark for century's. It transforms into some wings and they fly to the museum.