Royal entanglement among assassins

A dark-haired assassin known as the Blade Princess builds her reputation by getting in, killing her target, and leaving. She attacks a blonde-haired fighter known as the Prince, who disarms her with a hybrid combat style rooted in Jeet Kune Do. He knocks her out, and she wakes hogtied and barefoot, facing an interrogation where his quill becomes an instrument of control.