On a rainy day, a young girl slips and tumbles down the stairs. As death takes hold of her, she finds herself in front of a mysterious god, offering her a chance to reclaim her body. Despite becoming an ethereal, transparent presence, she’s noticed by a boy she coincidentally encounters. Together, they embark on a quest to uncover the girl's true identity and bring her back to life. Little do they know, the mark adorning the boy’s chest is the key to the lonely girl’s newfound hope. Whether to regain her memories or forge a profound connection, the bond they develop is as delicate as flower petals. As they swerve through life's twists and turns, they uncover mysteries that will leave you unable to suppress the overwhelming surge of emotions!

It was August, and the "Blue Moon" had come around - a phenomenon wherein two full moons appear in the same month. As a seventeen-year-old, I found myself in Arashiyama, Kyoto, at my grandmother's house for a somber funeral. It was on this solemn occasion that a peculiar encounter awaited me. Under the radiant light of the first full moon, I stumbled upon a mysterious sight. There before me was a young girl, gracefully using an umbrella to scoop water from a spring, her actions illuminated by the moon's ethereal glow. She said, "I'll be here until the Blue Moon ends," and despite our same ages, she had a mysterious aura about her, as if hiding a great secret. That secret was that “I've been waiting for you in the future." This is a love story stretching across time and space, depicting two people bound by fate.