Grudges of Rainbow (Kingdom Series #1)

Cyanna Mediore, a princess from the Kingdom of Mediore, has the spirit of a warrior. Women on their continent are only taught decency and art, but she's against this tradition, so she kept sneaking into the training house to learn sword-fighting.

One night, she met the foreign boy who had been adopted by her Queen mother and invited inside the walls of their kingdom.

Rain, the boy with lilac eyes and yellowish-copper hair, is an outcast, but Cyanna's young heart suddenly felt something strange as they spent every night training with swords and fighting.

Ten years later...

Cyanna Mediore is now an exiled princess and a trained assassin named Lost One, dressed up with a smudge of blood on her suit.

Vladimir Thoisco 'Rain' Evionoire, is now a bloody Ore prince, a usurper who stole their kingdom, and is now living in luxury.

She thought she knew the whole story but realized she was wrong as revelations from betrayal unfolded a different story, unraveling something that she never thought was part of usurping and vengeance-the colors of the rainbow.

The rainbow has the ability to evoke fury and hold grudges.