Knaked Knights is a movie about a bunch of naked men posing and playing with fake swords, and running away from a lizard man.
These videos, starring Half-fish man, became Gachimuchi sources.
A bunch of naked men emerge from a cave, as they try to capture an ivy-lined castle from one member's father and an evil princess. At first, they take down several guards and take away their armor and weapons, but more guards catch them and torture them in a dungeon.
They were thrown into a moat to be tormented by the Half-fish man, and the guards push them into the moat when they try to climb out. One of them uses his chains to stop the Half-fish man, distracting the guards and allowing his friends to leave the moat. They later fight the guards in order to escape.