1girl, breasts, crop_top, greyscale, hair_rings, kotoyama, looking_at_viewer, midriff, monochrome, nanakusa_nazuna_(yofukashi_no_uta), short_hair, simple_background, sleeveless, sleeveless_turtleneck, small_breasts, solo, turtleneck, white_background, yofukashi_no_uta