“After I grow older, I’ll become Mii-kun’s wife!” It was an innocent declaration by Kurashiki Kouri, the kindergartner. In response to those words, Mii-kun, or Kudou Michihisa, the recipient of those words— “Kouri-chan. Before becoming a wife, we have to be lovers, right?” Gave a serious reply. Kouri and Michihisa have been dating ever since. A couple with 15 years of dating history. With such an important promise with her, on his eighteenth birthday, Michihisa and Kouri registered together. They became a high school married couple. However, with the couple’s marriage, their parents proposed two requirements. Live independently and manage things financially on their own. With that, the two of them begin their happy fulfilling life as a married couple while worrying over their household budget. “I was happy to be able to flirt with Mii-kun every day! I thought.” “So you aren’t happy?” “I am happy, but happiness doesn’t make you full.” This story is about a newly married couple, living a life while saving money and flirting. In other words, a story about them using money saving as an excuse to flirt with each other.