1girl, bare_legs, blue_one-piece_swimsuit, brown_eyes, chuutaro_metal, flat_chest, genderswap, genderswap_(mtf), hat, light_brown_hair, looking_at_viewer, one-piece_swimsuit, onii-chan_wa_oshimai!, oyama_mahiro, school_swimsuit, sitting, smile, solo, sun_hat, swimsuit, wariza, yellow_background