Rule 34 Dev - 1girl blue_sailor_collar blue_skirt book brown_bag brown_hair cellphone classroom eraser expressionless full_body hugging_own_legs knees_up looking_to_the_side neckerchief necosuke on_chair original pen phone pleated_skirt red_neckerchief sailor_collar school_uniform serafuku shirt skirt smartphone socks solo table tile_floor tiles white_shirt white_socks window window_blinds|22483677645