Like the moon and sun, Ren and Kahiro lived side by side, separated only by pairs of windows and everything else that makes them different. Through a thin and long string, Ren and Kahiro shared whispers and jokes under the starry nights of Japan's countryside, when the world was planning against their innocent friendship. Was Kahiro and Ren's young bond strong enough to face challenges? or were their differences the very first raison of its ending?