Shin chan Me and the Professor on Summer Vacation The Endless Seven-Day Journey

Hiroshi is required to go to Kyushu on business, so the Nohara whole family decided to spend time with Misae, Kumamoto, a old friend from childhood.
They reach Kumamoto Station, on their journey towards Assou. Unknown to them, a stranger offers them a camera , which is in odd design. He asks for witnesses.
Shinnosuke can appreciate the Assou Mountains and fields of the summer season while he has his camera by his side. Shinnosuke was surprised to find animals in the fields of Assou and mountains that weren’t found in Kasukabe. There are people in the towns helping out and new ones to build.
But, don’t they look exactly like his kids at home?

In a cool summer night, Shinnosuke witnesses a giant beast silhouetted against the bright light of a full moon. The creature’s companion is a mysterious man sporting a a wide smile.
The same strange man gave the camera back to him when he arrived at the train station…
He also calls himself Professor Akuno. Assou is witness to more strange events that resulted of the encounter.