1girl, a tea, ahoge, arknights, arms behind back, bikini, bound, bound arms, chinese text, full body, goggles, goggles around neck, la pluma (arknights), la pluma (summer flowers) (arknights), looking at viewer, looking back, monochrome, navel, official alternate costume, one eye closed, rope, sandals, shibari, short hair, sitting, solo, struggling, swimsuit, thigh strap, whistle