Miho and Naoki made a plan to cut back on their living expenses and buy their own home in 10 years, but it seemed quite difficult with Naoki's income. To make things a little easier, Miho suggested to Naoki that he get a part-time job, but he refused, saying, "You want me to stay at home and support you without working." Then, one day, Miho found a page on the internet called "Easy smartphone investments"...