1girl, ahoge, armpits, arms_up, ball, beach_towel, beachball, bikini, blue_archive, blue_eyes, blue_jacket, blush, breasts, clenched_teeth, crab, eyelashes, feet_out_of_frame, frilled_bikini, frills, from_above, hair_between_eyes, heterochromia, hoshino_(blue_archive), hoshino_(swimsuit)_(blue_archive), jacket, knee_up, legs, long_hair, long_sleeves, looking_at_viewer, low-tied_long_hair, lying, morikawasansei, navel, on_back, orange_eyes, pink_hair, sand, shadow, shiny_skin, sidelocks, small_breasts, solo, sunglasses, swimsuit, teeth, thighs, towel, twintails, unworn_eyewear, white_bikini