1girl, breasts, closed_mouth, crop_top, greyscale, kotoyama, long_hair, looking_at_viewer, monochrome, nanakusa_nazuna_(yofukashi_no_uta), ringed_eyes, simple_background, sleeveless, sleeveless_turtleneck, solo, turtleneck, twintails, white_background, yofukashi_no_uta