arms_at_sides ass back black_eyes black_hair closed_mouth cube earrings expressionless from_behind gamma_ray_burst hair_ornament hair_over_one_eye hair_over_shoulder jewelry kiben_gakuha_yotsuya-senpai_no_kaidan komachi-sensei light_frown long_sleeves looking_at_viewer looking_back low_ponytail paper ponytail shadow solo sweater upper_body