Shizuku, the maid, was entrusted with raising the brother and sister adopted into the household alongside her master. The beautiful younger sister advanced to a boarding school, while the bright and energetic older brother decided to enlist in the military. To Shizuku, they were cherished family, and she took pride in them as a mother would. But as time passed, the boy grew into a fine young man. The relationship between maid and young master gradually shifted, as they began to see each other as more than just servant and master. Amidst their wavering hearts and budding feelings, the day of their departure draws near.