I laughed at the idea that the MC is into reading Isekai stories about someone who goes to a peaceful place called Japan and becomes a high school student. For someone from a danger-filled fantasy world, that really would be the ideal “slow life.”
Of course, the fact that the books mention “Japan” and “the States” implies that someone out there actually did get Isekai’d and then wrote about it. But it would be interesting if they just leave it at that for the time being.