1girl, aketa_mikoto, arm_up, armpits, bed_sheet, black_camisole, black_panties, blush, breasts, brown_hair, camisole, covered_navel, covered_nipples, feet_out_of_frame, gradient_hair, idolmaster, idolmaster_shiny_colors, looking_at_viewer, lying, medium_breasts, multicolored_hair, no_pants, on_back, panties, pillow, solo, suwa763, underwear