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.
Tsuyoshi starts an online drinking session with his two guy friends, and the college idol senpai, Miki Kanzaki. As Miki gets drunk from canned chuhai and exposes herself on screen, Tsuyoshi and the gang can't take their eyes off her.
Tsuyoshi goes round Joseph's house and meets his older sister and married Russian beauty, Anastasia. The three have canned chuhai, but Anastasia gets dead drunk and mistakes Tsuyoshi for her younger brother. He ends up taking care of her, but...
