Ultraman Ace: S1 E44 - Setsubun Scary Story! Sparkling Beans
On Setsubun day, Hokuto eats a red bean, and is infected by a strange disease that causes him to radically lose his muscle strength. This is all a clever plan that has been laid out by Terrible-Monster Onidevil. The diseased Ace is no match against the Onidevil, and after the losing, he heads to Nebula M78 for treatment.