1girl, a tea, ahoge, arknights, arms behind back, bikini, bound, bound arms, chinese text, goggles, goggles around neck, la pluma (arknights), la pluma (summer flowers) (arknights), looking at viewer, monochrome, navel, official alternate costume, pouty lips, rope, sandals, shibari, short hair, sitting, solo, sweatdrop, swimsuit, thigh strap, wariza