1girl, ahoge, alternate costume, arms up, bag, ball gag, bed, bound, bound wrists, gag, greyscale, hair ribbon, kantai collection, long hair, long skirt, looking at viewer, lying, mamiya (kancolle), monochrome, neckerchief, ojipon, on back, pillow, pleated skirt, ribbon, sailor collar, school bag, school uniform, serafuku, skirt, socks, solo, symbol-only commentary