Golden Drop from the sun

Eighteen year old Kinnokami Manshita has been locked up in a tower for eighteen years by her overprotective mother because of her magic hair that's twenty feet long and it glows when she recites a magic Hyme. It also keeps people young and healthy forever. It's an ability that needs to be kept safe from a group of people wanting to use Kinnokami's hair or so her mother says. On Kinnokami's eighteenth birthday she begs her mother to take her to see the floating lights that she sees that are lit every two years on her birthday however her mother refuses but that day a thief by the name of Kurokishi climbs into Kinnokami's tower to get away from Prince Izana and Prince Zen who where wanting to catch him for stealing their long lost little sister's crown who disappeared eighteen years ago. Meanwhile Kurokishi is blackmailed by Kinnokami to take to her to see the lights but despite there differences a sweet romance blossoms between the two possibly putting them both in danger....