1girl, bare_legs, blue_eyes, chair, classroom, desk, feet_out_of_frame, greyscale, holding, holding_pencil, idolmaster, idolmaster_shiny_colors, looking_at_viewer, looking_to_the_side, monochrome, naga-agan, on_chair, pencil, pleated_skirt, school_chair, school_desk, school_uniform, serafuku, serizawa_asahi, short_sleeves, sitting, skirt, solo, spot_color