Another aspect of irony in the short story lies within the fact that everybody who dumps things into the hole feels a selfish sense of relief in doing so, only to eventually have their worst fears realized. Toward the end of the story, Shinichi Hoshi writes that "[t]he hole gave peace of mind to the dwellers of the city," going on to detail some of the things that are disposed of within it:
Young girls whose betrothals had been arranged discarded old diaries in the hole. There were also those who were inaugurating new love affairs and threw into the hole old photographs of themselves taken with former sweethearts. The police felt comforted as they used the hole to get rid of accumulations of expertly done counterfeit bills. Criminals breathed easier after throwing material evidence into the hole.
Each person, organization, even government agency believes they have unburdened themselves by "getting rid" of their undesirable matter in a way which will not harm the world but particuarly themselves. However, the twist at the end of the story, when a construction worker atop a high building hears a voice say, "He-y, come on ou-t!" and then fails to notice a small pebble falling past because he "was gazing in idle reverie at the city's skyline growing ever more beautiful," reveals the irony that our selfish attempts to unburden ourselves without repercussion will only burden others or return to burden us tenfold. Eventually the things that were discarded by all of the people will return for everyone to deal with. Diaries will no longer be private, counterfeit bills will spread freely, material evidence will be out for all to see, nuclear waste will rain from the sky. Nothing ever truly goes away; if we try to make something go away, it will only come back and cause even more trouble than it did before.