I Travel to Another World on the Subway Every Day

An ordinary office worker does not have a nine-to-five job, only a nine-to-six overtime life. Suddenly one day, he traveled to... A different world on the subway after get off work. Not only do I work every day, but I also spend time in another world every night - teaching dragons to breathe fire, replenishing magic stones for magicians, coordinating and distributing potions for potion masters... Then suddenly one day my friends from another world appeared in our company?