1boy, 1girl, bed, black_eyes, black_hair, black_shirt, black_skirt, blouse, blush, breasts, closed_mouth, couple, cropped_legs, game_cg, hair_between_eyes, hakuchuumu_no_aojashin, hetero, holding, holding_pen, indoors, kaito_(hakuchuumu_no_aojashin), lab_coat, large_breasts, long_hair, looking_at_another, non-web_source, official_art, on_table, pen, pillow, red_eyes, shimofuri, shirt, short_hair, short_sleeves, sitting, sitting_on_table, skirt, smile, sunlight, table, white_hair, white_shirt, window, writing, yonagi_(hakuchuumu_no_aojashin)