1girl, bare shoulders, bloomers, blurry, blurry background, brown hair, concentrating, cup, digging, dress, hat, long hair, lying, neon-tetora, on stomach, outdoors, pink dress, playground, playing, purple eyes, sand, sand castle, sand sculpture, school hat, shovel, solo, tsukuyomi ai, underwear, v-shaped eyebrows, voiceroid, yellow headwear