It was a cold, cold winter event... During the winter vacation when he returned to his parents' home for the first time in several years, the young man suddenly made up his mind to visit Yukari, who was the older sister of his late mother and the young man's aunt. A young man who gently welcomes Yukari, who is still beautiful, and spends a warm time. However, when he learns of the existence of a man who admires Yukari, the young man can no longer hold back his feelings for his aunt...? ! A story about a cold winter with Yukari Hirose, a beautiful mature woman in her forties.