What is kaiko sareta ankoku heishi 30 dai no slow na second life?

"Kaiko Sareta Ankoku Heishi 30-dai no Slow na Second Life" is a Japanese light novel series written by Kisetsu Morita and illustrated by Benio. It was first published in 2014 and has been ongoing since then.

The story revolves around a group of 30 soldiers who were frozen in time during a war and revived 150 years later in a different world. However, they find themselves struggling to adapt to this new world and are forced to take up mundane jobs in order to survive.

The main character, Haruto Amakawa, is a former captain of the special forces unit and struggles to come to terms with the fact that he is no longer in a position of power and authority. He takes up a job as a librarian and slowly starts to adjust to this new life.

The series is a mixture of comedy, drama, and fantasy, and explores themes of identity, purpose, and redemption. It has been adapted into a manga series and has also been serialized as a web novel.