1girl ameshizuku_natsuki beaker black_bow black_sailor_collar black_shirt blurry blurry_foreground book book_stack bow brown_cardigan cardigan hair_bow hair_flaps hand_up holding holding_pencil indoors leaning_forward mechanical_pencil neckerchief on_table original partially_unbuttoned pencil pink_hair ponytail red_neckerchief sailor_collar school_uniform serafuku shirt sidelocks signature sleeve_cuffs solo swept_bangs table yellow_eyes