A separated couple, Shinju and Emi, keep in touch by snail mail. One day, Emi sends Shinju a single pebble as a message. What could it mean?

A single mother named Kaede is supported, at a distance, by her former high-school classmate Yuusuke, who still remembers their encounter in the Astronomy Club.

Yuwaka is interested in both his junior, Natsuki Noda, and his boss, section chief, Saya Tokitou, only to discover that the two women are romantically involved with each other.

At a company event, an unnamed man falls in love with Shizuka, but she is still entangled with another. They promise to meet in a year, but she takes another job. He returns the next year anyway, but is she there?