“Onii-chan. Please leave me here in this home…” Shingo left his hometown in the countryside to live alone in the city. Then during the winter break, his imouto Yuki, whom he thought he had left behind, traveled all the way from afar to live with him. His cousin Sae who visits him often for private lessons sensed the arrival of another girl. What was Yuki’s reason for coming? What actions will Sae take? Before he knew it, he laid his hands on their bodies….