The boy delivering newspapers is Kei, a hero of "Katte na Yatsura" (Those selfish aliens) written by Rumiko Takahasi.
Kattena Yatsura(Those selfish aliens)
It is generally said that Urusei Yatsura is based on "Katte na Yatsura".
amazon.com Rumic World Trilogy, Vol. 1
This volume has five short stories. "Those selfish aliens" is the first part, and "Fire Tripper" which is said to be prototype of "InuYasha" is the third part.
