Yu Mo was a waiter at a coffee shop near my university campus. I fell in love with her because I often went to drink coffee, and we officially became lovers. Later, I misunderstood that Xiaohan and I had an ambiguous relationship, and suddenly disappeared and went to Japan with Xiao Bei. On the eve of my graduation, I met Xiao Bei who returned to China, and learned that Yu Mo had become mentally disturbed, so I decided to go to Japan to see where she lived to find her. After I arrived in Japan, I found Yu Mo's friend Duanmu Lingzi in Japan. Later, with the help of Lingzi, I learned that Yu Mo was working as a waiter at the Undersea Hotel, but we later lost contact. Because I had to go back to school to do my graduation defense, I had to decide to go back to China. Then Lingzi developed feelings for me. After I returned to China, she came to me and fell in love with me. However, one day I received a call from Qiaoxi who worked at the Undersea Hotel and I decided to go to Japan again to look for Yumo...