Little Yohei was looking forward to going camping with Mom and Dad, but last minute work stuff comes up and Dad needs to cancel. Dad tells Yohei to be a good boy and accept the situation, but Yohei is upset. Yohei decides to leave home. As he leaves, Yohei can't help but to feel a little excited of the "adventure." It's Yohei's first "vacation" on his own.