Seiji and a high school martial artist, Ichiro, go to a preschool to teach the children about Setsubun and throw beans together. Ichiro spots an unusual red bean and, figuring it must be lucky, eats it. Suddenly, he loses all strength in his arms. Seiji and Konno both eat red beans and become strangely weak. The terrible-monster, Onidevil, appears.
Ultraman Ace Volume 11 features episodes 41-44.