NKO04-001 Kana-chan, a black-haired gal who is good at negotiating, is approached on the street corner and allowed to observe her mouth.

NKO03-002 Rika-chan, a bookstore clerk, is approached on the street and allowed to observe the inside of her mouth.

NKO03-003 Hatsumi, an organic supermarket worker, who I approached on the street and asked to observe her mouth