2girls absurdres bare_arms black_hair blue_one-piece_swimsuit blue_sky blurry blurry_background breasts brown_eyes clear_sky collarbone competition_swimsuit covered_navel day diving_mask diving_mask_on_head ebora english_commentary feet_out_of_frame fukiyose_seiri goggles goggles_on_head green_eyes grey_hair highleg highleg_swimsuit highres index_(toaru_majutsu_no_index) innertube large_breasts long_hair looking_at_viewer multiple_girls one-piece_swimsuit open_mouth outdoors pool poolside shiny_clothes shiny_skin sitting sky solo_focus sunlight swimming swimsuit thighs toaru_majutsu_no_index tree v-shaped_eyebrows water whistle whistle_around_neck