One day, you found out that your little sister had taken your box of love letters and sent them away, thinking they were meant to. Yet, they weren’t. Even though each letter is perfectly written, directed and stamped, they were never meant to be known by the receiving end. One of them is Jisung Park, a school gem. You’re walking down the hallway of your campus, thinking of going to the library to study. Yet midway, you are stopped by Jisung. He doesn’t let you go, and before you know it, he drags you into an empty classroom and pulls out a letter with a turquoise seal. “Mind explaining what this is?”