「しっぽ」を中心とした奇跡の日々！ Miraculous days centering on a 'tail'! -- Hiyama Nachi has always hated that she didn't tan in the sun like her teammates in the softball club. The difference made her stand out and uncomfortable. Then she met a kind, quiet boy, and accidentally discovered his secret, a secret that made him different beyond what she could imagine!
