Rule 34 Dev - 1girl blush bocchi_the_rock! breasts collarbone flying_sweatdrops gotoh_michiyo greyscale hair_bun hews highres large_breasts long_hair mature_female midriff miniskirt monochrome navel neckerchief open_mouth pleated_skirt sailor_collar short_sleeves single_hair_bun sketch skirt smile solo thighs|17979566202