Dullahans are demi-humans whose heads are separate from their bodies. Naturally, Tetsuo is intrigued by the unique traits of dullahans, but Kyouko is just as interested in learning more about her own body. Tetsuo has the idea to ask the opinion of someone outside of his own background in biology, so he takes Kyouko to meet Souma, an old college buddy.
Regarding the joints of Machi-kun's neck...
...بشأن مفاصل عنق ماتشي-كُن
Hinsichtlich der Verbindungen
deines Halses …
En cuanto a las uniones
del cuello de Machi-kun…
En cuanto a las uniones
del cuello de Machi-kun…
Mais en ce qui concerne
les jonctions de son cou…
Venendo ai punti di collegamento
con il collo di Machi...
Em relação às juntas do seu pescoço...
Насчёт мест соединения шеи Мати...