By Chance

Over the course of the summer until her graduation, with changes she can't control but also being protected by the mochi which looks over important times, Yuna, a 15-year old student begins to change so that she will not forget.

When a door closes, they say another one opens in its place. Yu Nana (Nan Sheng) is a graduate student who has been pursuing her doctorate in psychology for the past eight years. While all of her college friends have secured jobs or married, Nana has been studying hard and preparing for her thesis. All her hard work seems to have been wasted when her thesis fails again and she is denied her Ph.D., plunging Nana into despair. The next day, Nana receives a strange email from Sasai Eisuke (Terada Takuya), a Japanese businessman. Wanting to escape from her failures, Nana takes the stranger up on his unusual offer and sets off for a trip to Japan that will change her life.