ina (gokihoihoi), nagi, kannagi, 00s, 1girl, angle, blue hair, blunt bangs, blush, border, bra, breasts, female focus, geometry, hair tubes, hairband, lingerie, long hair, looking at viewer, math, nipple slip, nipples, outside border, oversized breast cup, oversized clothes, red eyes, sideboob, simple background, small areolae, small breasts, small nipples, solo, underwear, white background, white border, yellow background