1girl, ball, baseball, baseball_(object), baseball_mitt, black_skirt, black_thighhighs, blush, border, broken_vase, brown_eyes, buttons, clenched_hand, cosplay, green_background, green_eyes, green_vest, hair_between_eyes, idolmaster, idolmaster_million_live!, legs, lielos, long_sleeves, looking_down, nagayoshi_subaru, on_one_knee, open_mouth, otonashi_kotori, otonashi_kotori_(cosplay), panties, pantyshot, pencil_skirt, sandals, shirt, short_hair, skirt, solo, sweat, thighhighs, thighs, underwear, v-shaped_eyebrows, vest, white_border, white_footwear, white_panties, white_shirt