Taeyeon and Jessica were in the same school during high school. They have been in the same class in the second year of school, but they were never close. One day, after more than five years they graduated from high school, one of their friends inviting them to join in a group chat for a reunion even though only through a chat application.

Because Taeyeon had a crush on Jessica in high school, she immediately trying to find the name of Jessica on the list of members of their group chat.

Taeyeon never meet Jessica again after they graduated from high school, and she was very happy when she found the name "Jessica Jung Sooyeon" are also in the list of group chat members.

She wondered how’s Jessica now, so she decided to add Jessica as a friend, to be able to chat with her in private chat.

Even when still in high school they were rarely talk to each other, but this time Taeyeon really want to be able to chat with Jessica.  She thought that it might be time to try to be close to Jessica. It’s time to begin everything, isn’t it?