@CountryMage:
There are 2 reasons why he faces this issue:
1. He is the MC and hence a living calamity magnet.
2. He raised the flag himself by especially asking if there were no strange occurances in that place.
The MC hails from Japan so he should obviously know about the effects of being a transported/summoned/reincarnated person and also about the issue of raising flags.
Yet he still did not account for either of it.