Tomoyuki, who left his parents' house and spent his school life alone in a dormitory. Three years passed by in the blink of an eye, and he finally reached his graduation ceremony. While walking down his last school route with his friends, a woman suddenly appears. A beautiful smile full of kindness... It was her mother-in-law, Ririko, who had secretly come to celebrate Tomoyuki's departure. Then, Tomoyuki takes Ririko, who drank too much, to his accommodation, saying, "Today is a celebration."
