As a 28-year-old businessman, the man runs into a Chinese classmate from high school in Aoyama. Although they talk for a while in a coffee shop, the man is unable to recall who his colleague is until the line "a lot of water has gone under the bridge" is uttered, a memorable line from their English textbook from high school. The colleague then tells him about how he sells encyclopedias to Chinese families in Tokyo. Wanting for information about the infobooks, he gives his business card to the colleague before they go their separate ways.