While traveling the wilderness, Mizuho asks Yamabiko how he became a dog. Yamabiko then relates how, 5000 years ago, he wandered different worlds all alone, until meeting a girl to whom he gradually opened his heart. But their happiness was short-lived.
I've wasted most of my life doing so.
Then I regret having done that.
أهدرت حياتي في التحسر 
.ثم تحسرت على ذلك أيضًا
Ich wende praktisch mein
ganzes Leben dafür auf.
Desperdicié la mayor parte de mi vida
haciéndolo. Así que lo lamento.
Je passe le plus gros de ma vie à ça,