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

Hiroshi is required to go to Kyushu to attend a business meeting, and so the Nohara whole family decided to spend time with Misae, Kumamoto, a former friend of the family.
They arrive at Kumamoto Station on their way to Assou They meet a strange man who offers them a camera that is even more bizarre under the condition that they act as his witnesses…
Shinnosuke can appreciate the Assou mountains and fields of the summer season by using his camera at his side. The scene is filled with creatures that he would not see in Kasukabe. Also, there are townspeople who can help him and making new acquaintances.
They look similar to his kids at back home?

One cool summer night, Shinnosuke witnesses a giant monster silhouetted against the glowing light of the full moon. A strange, smiling man sits next to the monster.
This man also gave the camera back to him when he arrived at his station…
The man calls himself Professor Akuno. Assou witnesses more odd events in the aftermath of the encounter.