
Tsuyoshi, a third-year college student, leads a lazy life drinking cheap and tasty canned chuhai. One day, his aunt, Yui Koriyama, who he has a soft spot for, pays him an unexpected visit.
On a midsummer's day, Tsuyoshi heads to the convenience store to get chuhai, and reunites with Ai Natsuno, his junior from high school. Ai is now married, with a huge makeover as a sun-kissed gyaru, but acts like a spoiled child around Tsuyoshi, just like she used to.