In the not-too distant past, there once was a young man with a huge body. His name is Sakaguchi Matsutaro, a legal adult who still attends junior high school, and has a crush on a teacher, Reiko.  One night he and fellow laborer Nishio go on a joy ride in a truck; Matsu is on cloud nine, but ...
Was that Nii-chan in there?
Saß da nicht Nii-chan drin?
¿Era ese nuestro hermano?
¿Ese era nuestro hermano?
Não era o maninho lá dentro?