Nasa and Tsukasa take an overnight bus to visit his parents in Nara. They attempt to enjoy the trip like a honeymoon, when Chitose shows up at a service area, asking to know why Tsukasa married Nasa, who happens to overhear the conversation and begins to wonder the same thing. As the couple attempt to enjoy seeing the sights in Kyoto, Chitose appears again. She attempts to test Nasa to see if he's worthy to be married to Tsukasa, and he explains why he decided to marry her.
Marriage has existed for so long 
that it's hard to trace its origins.
.وجد الزواج لوقت طويل لدرجة يصعب فيها تقفّي أثر أصوله
Das Konzept der Ehe ist so alt,
El matrimonio existe
desde tiempos inmemoriales
El matrimonio existe
desde tiempos inmemoriales,
Le mariage
Il matrimonio esiste da così tanto tempo
 che è difficile risalire alle sue origini.
O casamento existe há tanto tempo
que é difícil rastrear suas origens.
Браки существуют настолько давно,
что очень трудно отследить истоки.