Mr Lopez's Little Door is an argentinean comic made by Carlos Trillo (script) and Horacio Altuna (art).
It was published regulary in a humor comic magazine from 1979 and 1980, El Péndulo and Humor respectively. I translated all the comics of the first recopilation volume from spanish to english. Keep in mind that this is an argentinean comic and it has a lot of hints to argentinean society.
The strips are about a little man (Mr. Lopez) who escapes from reality using his imagination, always after locking himself in the closest bathroom.
This was a non official translation so it might have some mistakes.

PD: the comic has some erotic art at some parts but if it doesn't fit in the western section it could be moved to Misc.