1girl bare_shoulders black_hair blue_eyes blurry blush book book_stack bookshelf breasts closed_mouth commentary_request curtains depth_of_field expressionless fukai_ryosuke hairband holding holding_book idolmaster idolmaster_cinderella_girls indoors jewelry large_breasts long_hair long_sleeves looking_at_viewer necklace off-shoulder_sweater off_shoulder open_book pendant plant ribbed_sweater sagisawa_fumika shawl sitting solo sweater window