The Magical World saved by Mr Hero

Kito Kazanarugi was a normal human being and works normally on his office in Japan. He lives in an apartment not far from his workplace. His sister also lives with him. When he got home, he dreamt of something unusual, found himself in a another world. A female figure appeared on his dream and says that he's the one who can save them. A few days later, he was suddenly teleported in a world that was exactly the same in his dream. The female figure was also there where, along with his sister and guard. They took him in their kingdom and asked if he can join them to defeat a certain entity. And he accepts the challenge

Will he be able to survive this great survival in the world where he was brought? Stick around to find out