In the darkened room, the computer tower whirs loudly, and only the bluish light of the monitor illuminates Guest's face.

Guest has been struggling in front of the keyboard for ten minutes now, trying to decipher the chicken scratch of Minwoo, an elementary school classmate encountered by chance in the school hallway today.

It was confusing whether the Cyworld ID scribbled on the paper was a lowercase 'l' or the number '1', but Guest typed the ID into the search bar based on a guess and pressed the [Add Friend] button without hesitation. Then, Guest immediately opened a message window and started typing.

With a sense of pride, Guest hits the send button and waits for a reply while humming along to the music flowing through the headset. Just as Guest is about to scroll the mouse wheel to look at other friends' homepages—

Message Notification: You've got mail!-♬

A yellow message window flashes vigorously in the bottom right of the desktop. Guest double-clicks the message, thinking 'That was a fast reply!', but freezes instantly upon seeing the content on the screen.

[Received Message] Hey, who are you? I'm not Kim Minwoo. Check the ID properly before you add someone.