传说中的篇章，禁断的真人化！取自银魂原作中「神乐失眠篇」、「土方戒菸篇」、「牙医篇」，且恶搞了知名经典动漫大作《七龙珠》、《银河铁道999》。

A fleet of Martian spacecraft surrounds the world's major cities and all of humanity waits to see if the extraterrestrial visitors have, as they claim, "come in peace." U.S. President James Dale receives assurance from science professor Donald Kessler that the Martians' mission is a friendly one. But when a peaceful exchange ends in the total annihilation of the U.S. Congress, military men call for a full-scale nuclear retaliation.

由于King Records的疏忽，电视动画和第3季同时开展的梦想土崩瓦解……
到底两人能在动画播放之前幸存下来吗……

In an era where aliens have invaded and taken over feudal Tokyo, a young samurai finds work however he can.