summer time machine blues

theres 3 scene link to summer time machine blues, 1 with the professor from summer time was giving a lecture(with the same clothes like he wore in summer time) and when 4 character from the summer time machine blues gang appeared in the book store and in the "udon pilgrimage" scene..

anybody knows what the connection between this movie with the summer time machine blues, i've checked and the 2 films come from different directors and writers,

When you oppress people, they rise up in a fiery anger