Warau Salesman (1968-1971)
A dark comedy manga from the duo that created the iconic "Doraemon" manga! This is actually a darker version of the Doraemon manga. The manga follows a salesman named MogOrou Fukuzou who deals with customers that have a ungranted wish. but he sets a deal and some terms and limits how far he can go. if promise broken then it is gonna be a heavy cost.