Crayon Shin-chan: A Dream in Full Bloom

A story about Shin-chan's youth in high school (and a story to make up for some of my regrets, like Matsuzaka and Dr. Deran).

It begins just as Shin-chan is about to start high school with everyone else.

After passing by his old kindergarten, he runs into someone completely unexpected.

He meets someone he never expected to see before school starts.

Who could it be, and what kind of youth will Shin-chan have?