Talk:Helina/@comment-2600:1700:8950:6970:DD1B:A27B:791C:353A-20190917205559/@comment-4905541-20190919013408

According to the oldest After Story volumes when the class came back they told everybody the whole truth leaving the burden of proof to the curiosity of the public, basically "You can believe it if you want to, but I won't be showing proof because I'm not obligated to do so." Unfortunately, our modern society doesn't believe parallel fantasy world summoning and magic so what the media and government/institutions did instead was think that the returnees were crazy or that they were involved with occult fanaticism. Worse, "society" pointed their fingers at Aiko (the teacher) since she's the only adult with them and chastised her with terrible allegations. Hajime and co. (mostly Hajime) couldn't bear that since he loves Aiko so he basically made an artifact that works on mass media and brainwashed the whole population of Earth into losing interest in the topic and slowly forgetting about it or not seeing it as that important anymore. The topic was soon forgotten as news like terrorist attacks (ISIS, etc.) and other "normal" news basically piled over it over time.

In short, it's not that they don't know the godslaying demon king and co. don't exist. They just didn't believe it, and were brainwashed until they sort of lost interest in it until they forgot about it due to the passing of trends. It's not like the MC and co. would go out of their way to be Earth heroes what with politics and stuff on Earth being much more complicated and dirty they would rather live normal lives again instead.