"Why did you invite me?" "I just liked doing it the same way."

Al and Milo are classmates and childhood friends who live next door to each other. Milo is straightforward and honest, while Al is always carefree and it's hard to tell what he's thinking. But strangely enough, the two of them have always spent time together.
One day, just before the holiday season, Al invites Milo to go on a trip just the two of them. Although he is confused by the sudden invitation, Milo has no reason to refuse and readily accepts.

The trip begins without knowing where they're going, and the destination is a place they visited with their family when they were young. When Al asks why, he just evades the question, and it seems like he's hiding something...