RAINBOW First Light 是以四个角色构成的音乐企划，围绕蓝色、静谧、透明感，以及季节更迭间微妙的界限展开。每个角色通过不同的音乐风格，诉说夏末秋初流转的情绪，潮湿的空气、城市的灯火、晚风，以及属于成年人之间那份克制的距离。本系列涵盖EUR、Lo-fi、Country Pop与City Pop四种核心曲风，捕捉季节的交替与心境的悄然蜕变。 RAINBOW First Light is a four-character music project built around the themes of blue, stillness, transparency, and the subtle boundary between seasons. Each character expresses the shifting emotions found between summer and autumn-humidity, city lights, evening winds, and the delicate distance of adult relationships- through a different musical genre. This series features four core styles: EUR, Lo-fi, Country Pop, and City Pop, capturing the transition of seasons and the quiet evolution of the heart.