I don't get why people uttering nonsense about this. If you compare this one to many of isekai novels, you will know which one is the most chuuni. And I'm surprised there is people complaining about unnecessary ecchi here. So far, there are only girls talk & a man 'courting' woman in fight.
Spoiler
Unless you're a kid who are bothered by seeing a girl in nude covered in ice.
Nonetheless, it's a slow pace story. The tension is also built up pretty well. The story is about a boy who struggles keeping his promise with his precious person while defying the world who works against him.
I suggest you to read the prequel if you want to know further about the details of the story. ( although you can read it as it is because it's not that important)
As for the characters, they have unique personalities and play significant roles to the story. The author has done well in doing that, so they are not ended up just being mob characters. While the setting of the story is dark, the funny and warm interactions they have break the ice on itself ~~(no pun intended)~~ .
The only thing I want to criticize is:
Spoiler
how the others (aside from his old friends) don't remember him, despite him being famous for his excellent ability, after only disappearing for 3 years.
The current translator has continued the work. Kiddos to them!
I just hope they remain on continuing this despite them being whimsical.