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...

One night when Tsuyoshi was wandering around town with canned chuhai in his hand, he meets a wild tanuki, and gets led to a big mansion. There he meets a tanuki-faced beauty, Tamami Miyazawa, who gives him a warm reception, but for a certain reason...

By chance, Tsuyoshi ends up having a one-night stand with Nozomi Kuji, a married woman who looks too young for her age. Since then, they've become canned chuhai drinking buddies. In the midst of this, Nozomi vents out her frustration about her busty-loving hubby, and Tsuyoshi gets lectured on the appeal of small breasts...

Tsuyoshi enters a parallel universe and saves a dark elf beauty, Symphis with the skill he gained from the chuhai god. Tsuyoshi gradually becomes drawn to Symphis as she talks about her husband, but something doesn't add up...