1girl, a_tea, ahoge, arknights, arms_behind_back, bikini, bound, bound_arms, breasts, 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