1boy, 1girl, ?, a tea, ahoge, arknights, arms behind back, bikini, bound, bound arms, chinese text, eating, food, goggles, goggles around neck, greyscale, hammock, ice cream, la pluma (arknights), la pluma (summer flowers) (arknights), monochrome, official alternate costume, rope, sandals, shibari, short hair, simple background, sitting, swimsuit, thigh strap, white background