"It's fully erect, y'know?" Eiji and Koichi are so close that their coworkers think they're an item. They roomed together in high school and have been inseparable ever since. They went to the same college, joined the same company, and even rented the same apartment building after marriage. But then, both of their spouses file for divorce! As they drunkenly console each other, the conversation turns to Eiji's erectile dysfunction. Koichi pushes Eiji down, saying he will "compare it with what it was like 20 years ago." Before long, they're both engaging in mutual masturbation and making each other cum?! What will become of this 20-year-old mutual love affair...?