Splash! A New Training Method is the 12th episode of the Seven Heavenly Virtues short series. It is one of the unaired episodes included in the Blu-ray/DVD release complete box.
Summary[]
Michael orders the Virtues to come to the park in swimsuits. They are embarrassed, but Sandalphon had developed a device that renders them invisible to the public. Michael hands them all water guns and orders them to fight so they can train their aiming and dodging abilities. The other Virtues don't take the training seriously and just have fun spraying each other. Annoyed, Michael gives them added incentive by enchanting the water so that it dissolves clothing on contact. They battle and are all rendered naked. Unfortunately, some water splashes on the device and it breaks, exposing them to a gawking crowd. They all scream and cover themselves in embarrassment.