1girl, arisugawa_natsuha, bad_pixiv_id, black_necktie, black_shirt, brown_eyes, closed_mouth, collared_shirt, cup, disposable_cup, dress_shirt, formal, hand_on_own_chin, holding, holding_cup, idolmaster, idolmaster_shiny_colors, index_finger_raised, jacket, jacket_on_shoulders, jacket_partially_removed, leaning_back, long_hair, long_sleeves, looking_to_the_side, necktie, okano_yuuto, orange_hair, pants, ponytail, red_jacket, red_pants, red_suit, shirt, sleeves_rolled_up, smile, solo, suit