kogaku kazuya, hatsune miku, hiiragi kagami, izumi konata, lucky star, vocaloid, black legwear, 2girls, ahoge, bare shoulders, blue hair, blush, breasts, cosplay, covered erect nipples, detached sleeves, female focus, flat chest, grabbing another's breast, green eyes, groping, hatsune miku (cosplay), indoors, long hair, miniskirt, multiple girls, navel, nipple stimulation, nipple tweak, nipples, no bra, on bed, open mouth, purple hair, school uniform, serafuku, sitting, sitting on person, skirt, sweat, tears, thighhighs, twintails, very long hair, yuri, zettai ryouiki