Hiroyuki is a high school student. He happens to know that Kaho, his classmate, and Kasumi, Kaho's sister and his classroom teacher, have a lot of outstanding debt their deceased father left. He feels sorry and offers Kasumi to lend some money, but she refuses it. He negotiates with a creditor about it, but their debt is bigger than he expected. To pay off their debt, he starts day trading.... [From Eroge Shop] Unlike the story of the previous game, now Hiroyuki helps the sisters for free. Now it's pure love story.