Qiu Suiqiao (played by Nakamura Shido)'s wife Ryo Akida (played by Takeuchi Yuko) passed away a year ago, and she lives with her 6-year-old son Yuji (played by Takeuchi). Before she died, her wife told them that she would follow the raindrops and come back to see them in the next rainy season. The son is convinced that his mother will come back to them at this time...