Green (Kikuchi Ahizi) and Zhensheng (Nakajima step) are lovers who have been in contact for four years. One is lively, cheerful, unrestrained and free, the other is reticent and introverted. Many people are puzzled by the fact that two people can fall in love for so many years. Zhensheng has to go to India on a business trip for three months because of his work. His loneliness in a foreign land makes him miss Green very much. However, whenever he sends a lot of letters to Green enthusiastically, he always gets a cold response from Green. This makes Zhensheng's heart very bad. With the passage of time, there is less and less contact between the two people. In fact, Green has her own difficulties, because not long after the real life left, she found out that she was pregnant. When Zhensheng learned about this, he immediately rushed back to Japan, and the two decided to get married.
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