the MC doesn't immediately go to relax, but keeps his guard up and analyzes the situation. XD
The MC isn't an ani-taku[anime otaku] or novel otaku who magically knows sh*t after being transported into another world. He tries to keep calm and make sense of the things that occur to him.I mean, although it happens later, you don't see him even spare a thought about the posibility of magic or something fantasy-like like that.
problem with isekais, the explanation of language barrier, reincarnation and transmigration can explain it but when being summoned or transported it isn't explained well with a few exceptions.
Rhode the top player who was one of the strongest players
Now quiting game after killing the dragon (Final boss)
Unknown race (not human).
Leiya [Half angel]