Rule 34 Dev - 1girl bare_arms bare_shoulders blonde_hair breasts brown_hair cleavage collarbone corrector_yui covered_navel curly_hair female_focus half-closed_eyes k0n0n kasuga_yui leotard looking_at_viewer medium_breasts medium_hair parted_lips solo standing strapless thigh_gap white_leotard yellow_background|10031387535