1boy, 2girls, arknights, ball, bikini, black_hair, blue_sky, cane, day, elysium_(arknights), elysium_(shimmering_dew)_(arknights), eyewear_on_head, food, grey_hair, horns, ice_cream, la_pluma_(arknights), la_pluma_(summer_flowers)_(arknights), long_hair, looking_at_viewer, multiple_girls, nozaki_tsubata, outdoors, purple_eyes, red_hair, short_hair, sky, sunglasses, surtr_(arknights), surtr_(colorful_wonderland)_(arknights), swimsuit, thigh_strap