1girl, ahoge, ariaridoradora, ass, blush, breasts, brown_hair, heart, heart_pillow, hugging_object, idolmaster, idolmaster_shiny_colors, indoors, kuwayama_chiyuki, long_hair, looking_at_viewer, lying, no_pants, on_bed, on_stomach, open_clothes, open_shirt, panties, pillow, pillow_hug, shirt, sideboob, smile, solo, straight_hair, underwear, very_long_hair, white_shirt