Original Japanese Web Novel<br /> <br /> Kazura buy lottery on a whim but he was selected as the winner and received 4 billion yen (about 40 Million US$).<br /> To evade the hyena that smells the scent of money, Kazura take shelter on an old residence that was handed down from generation to generation.<br /> When Kazura is investigating the place that would become his shelter, he stumbled on a certain room where it possible to come and back into another world.<br /> The Culture and Technology level of that world is relatively low. The protagonist sometimes brings goods, sometimes bring technological knowledge. At that world, he will find his value as a person.