Rule 34 Dev - 0tacat 1980s_(style) 1girl absurdres asou_yuuko blue_eyes blue_hair blue_sailor_collar book closed_mouth happy highres holding holding_book looking_at_viewer mugen_senshi_valis oldschool retro_artstyle round_eyewear sailor_collar shirt simple_background smile solo third-party_source thumbs_up white_background white_shirt|16734555045