It was all a joke. My student, Sato-kun, who had no particular aspirations and couldn't decide on a future path, asked me out on a date after graduation. I thought, if that's what it takes to get him motivated... so I carelessly made a promise. However, after that day, Sato-kun started working so hard that I couldn't back out. I thought, well, it's just once, and my husband won't find out. And so, I kept my promise and went on a date with Sato-kun after he graduated, but things turned out so differently than I expected.