一首以雨日的静谧之美为灵感，温柔而动人的乐曲。 收录初音未来与IA献声的两个演唱版本，以及一版突出细腻钢琴、弦乐与氛围音景的纯器乐版本。 歌曲捕捉雨中流淌的平静、怀旧与静谧心绪。 A gentle and emotional piece inspired by the quiet beauty of a rainy day. Featuring two vocal versions performed by Hatsune Miku and IA, along with an instrumental (Off Vocal) edition that highlights the delicate piano, strings, and atmospheric soundscape. A song that captures the calm, nostalgia, and quiet emotions carried by the rain.