The war of hearts

After the Unification War, won by the mighty country Pandrea, the migrators and the pandreans were united, against the migrators' will. Secretly, the migrators started developing a serum that would give them extraordinary abilities which would help them take their revenge on the pandreans and free themselves of them. The serum was proven to work, but only in proportions of 20%, the remaining 80% dying. The migrator leader wasn't willing to take any chances with his life, so he started working on a new experiment, this time instead of injecting a serum, you would get a chip implant. With the last experiment failing, he decided it wouldn't be wise to let the successful subjects to live, and so decided to kill them. Before they had the chance to kill them, they managed to escape and allied with the pandreans against their own, becoming their guardians. Though the new experiment wasn't making them as strong as the previous one, it had a 100% chances of working and so many of the migrator got it. For many and many generations after, the migrators and the pandreans fought their civil war, until nowadays.

Isabelle is a lady migrator, the best of the fighters even, who will do anything for Will the prince be able to do his duty and kill, according to many, the most beautiful girl in the world, who left him lusting after her from their first encounter?