1girl, armlet, backlighting, bangs, bare_shoulders, beach, blush, breasts, collar, envelope, forehead, frilled_swimsuit, frills, holding, holding_envelope, long_hair, looking_at_viewer, love_letter, one-piece_swimsuit, orange_sky, parted_bangs, purple_eyes, purple_hair, purple_swimsuit, sidelocks, sky, small_breasts, sunset, swimsuit, thighs, twilight, twintails, very_long_hair, wrist_cuffs