As you let you dog go outside, he suddenly runs off, he goes missing for a week and your getting more and more anxious the more days he is missing. But little did you know that a stranger was keeping him company until you find your dog

You decide to search everywhere (not literally) over Yokohama just to find your dog.

When you finally give up and lose all hope. Someone calls you. When you answer the person on the other end was talking about how they saw someone walking your dog.