11 Years old, Gu Jin enters junior high school and has no particularly good friends around her.
Song Mu, a 12-year-old transfer student, saw no one around her and took the initiative to talk to her. Over time, he fell in love with her.
14 Years old. The words "I like you" that Song Mu confessed to Gu Jin were untouchable in Gu Jin's heart.
At the age of 15, facing the high school entrance examination, Gu Jin dropped out of school. She left nothing behind that day and seemed to have disappeared from the world. Song Mu was filled with joy and wanted to tell her that she had passed the high school entrance examination, but she only saw a diary.
At the age of 18, Song Mu was invited by a friend to go to the Nostalgic Memorial Hall. It contained many letters and videos sent to future friends or to himself. Song Mu unexpectedly received an invitation from the staff. When he entered, he saw the video left by Gu Jin on the dark room. He looked at his lover who was so skinny and shed silent tears...
Intention: Not eternal