Hyunlix

Hyunjin, a Tokyo high school student, and Felix, a boy from the countryside, begin switching bodies in their sleep. They live each other's lives, study, share experiences through notes, and fall in love despite the distance. Suddenly, the swap ends, and Hyunjin learns of a comet that destroyed Felix's hometown and the temple where he lived. Hyunjin sets out to find him, believing Felix to be dead. In the destroyed city, he experiences a moment of remembrance and realizes that Felix was in his body too. They see each other as spirits, and Hyunjin realizes that he can save Felix by warning him of a tragedy in the past. He leaves a message on Felix's hand in the hopes that he will remember him, but Felix does not have time to do the same. The message left on Hyunjin's hand reads "I love you."