1girl ahoge arm_strap breasts brown_hair clenched_hands commentary_request green_eyes green_shirt hat highres large_breasts long_hair matsuda_(matsukichi) midriff mini_hat mini_top_hat mr._c.b._(umamusume) navel open_mouth shirt signature simple_background single_bare_shoulder sketch solo sparkle stomach strapless strapless_shirt teeth top_hat umamusume upper_body upper_teeth_only white_background white_headwear