Manga Isekai ni Kita Mitai dakedo Ikanisureba Yoi no Darou

One morning the worker was transferred to other reality. He was 35 years old. He doesn't understand what to do. Doesn't know how to get out of the situation. It isn't sure that will be able physically to resist to enemies. He you realize only that he has a purpose – to continue to live with those skills which remained with him from the previous life. Really I am a hero? Demon? I have no slightest idea. It seems to me, I am just a person, living for salary.