1girl, o, animal_ears, animal_print, bikini, blush, breasts, fake_animal_ears, grisaia_(series), grisaia_no_kajitsu, long_hair, medium_breasts, navel, pink_background, purple_eyes, purple_hair, sakaki_yumiko, solo, swimsuit, tail, tiger_ears, tiger_print, tiger_tail, underboob, watanabe_akio