I thought this was going to be a dumb fan-service based action harem anime about "your ordinary high school dude that's thrown into the world of magical powers where he becomes OP and seduces every girl!" In other words, I was very confused what was going on and didn't think I would like this.
That was, until he ended up in the whole and heard the spirits talking to him. That's where you got me interested in what's going to happen.
As long as the plot is around that, I'm hooked