A Wealthy Young Man from Both Worlds

YY, who was bored, magically traveled back and forth. From then on, my life had meaning. Let's have fun with white-collar, blue-collar and gold-collar. Being a nouveau riche in modern times, being a rich young master in another world, practicing martial arts and bragging when you have nothing to do, who has such a carefree life? Modern things are new inventions in other worlds. I have been working hard for the great ideal in my heart...