[Light novel] The second old man in another world, the strongest high school student hero (3 books in total)

Publisher: Alpha Polis
Author: Yagami Nagi
Size: 128mm x 188mm
Number of books: 3
Language: Japanese
Category: Light novel
Latest release date: 2023-12-15

Synopsis:
Riku Takayanagi, a salaried worker who does not go up.
He had a special past that once adventured in a different world, and now lived in Japan as an ordinary office worker.
However, one day, a three -way high school student, who was walking in front of him, was suddenly summoned to a different world and was involved in it, and he would go to another world again.
Although it was a sudden confusion, he encouraged high school students who are more confused than him and convey how to live in a different world.
On the other hand, the princess, who summoned high school students, begged them to say, "I want you to defeat the Demon King," but for another purpose ...
The second adventure of the old man is now starting- !!