Kyōjo Ero, a sophomore in high school living in a closed town, suddenly discovered a strange account appeared on his computer one night. The extension of his fate was intertwined with another soul... The story of a boy whose life is full of mystery and a strange girl who came to the background of the world unfolds. The promise they made together will still be circulated in this world for a long time. Looking back many years, will there still be the figure of the girl who made the young man throb waiting on the streets full of fallen cherry blossoms?
"If I can't witness it with you, then I will make a promise with you that will always count."
"If you can't keep those pale pink blooms on the trees in late spring forever, then at least let me catch a piece of flying cherry blossoms for you."
"The love that cannot be expressed in the future will linger in memories for a long time; the promises that have not yet been fulfilled will drift forever on the extension of each other's destiny in this world."
Concept: When a boy and a girl meet and fall in love, the pure and beautiful heart beats, the beauty of the most youthful years, the meaning of commitment, and the definition of love