Kosuke Okuda (played by Jun Matsumoto), a young man who works for an advertising agency, follows his senior to visit clients. Unexpectedly, he reunites with his first love girlfriend Mao Watarai (played by Ueno Juri) in the other company's company. When Kosuke (played by Takumi Kitamura) was studying in Enoshima, a cute but cute guy suddenly came to the class...