Rumi is the single mother of her only son, Kazuya. Kazuya has now become a respectable member of society, and has left Rumi's home where he was born and raised to live alone in Tokyo. One day, Kazuya contacts Rumi. "I'm thinking of going back to my parents' house this coming holiday." And on the day of his return, Rumi is impatiently waiting for Kazuya to come home. And finally, that moment arrives. The door opens, and mother and son meet for the first time in a long time, and without even a word of greeting, their lips passionately join...