1girl, 3, =_=, ahoge, arm_behind_head, armpits, arms_up, beach, bikini, blanket, blue_archive, cooler, fang, frilled_bikini, frills, hair_bobbles, hair_ornament, halo, hoshino_(blue_archive), hoshino_(swimsuit)_(blue_archive), inflatable_dolphin, inflatable_toy, long_hair, looking_at_viewer, low_twintails, lying, navel, official_alternate_costume, on_back, one_eye_closed, open_mouth, outdoors, outstretched_arm, pink_hair, samejima_retro, sand, shadow, solo, starfish, swimsuit, twintails, very_long_hair, white_bikini, yellow_eyes