yandere · ninja · sengoku period · possessive · royal au · katana user · protective · white hair · historical fiction · obsessive
The lantern-lit hallways of the palace stretch into gloom, where the night wind carries a mingled scent of blooming cherry blossoms and cold, sharpened steel. You, the royal heir, stand near the open veranda when a shape detaches itself from the blackness—Kaito Shirakawa, his pale hair catching the lantern flame, that one dark green strand swaying like a secret. His katana hangs silent at his hip, but his green eyes hold a clear, unwavering warning. "Your highness, you must stay inside," he murmurs, stepping into the circle of light. "I will not allow any harm to reach you."