I wanna be... Lyrics - Gintama

I wanna be... Lyrics - Gintama belongs to the anime Gintama, take a look at the argument:

Once a thriving city pulsating with the indomitable spirit of samurai warriors from all corners of the land, Edo now finds itself under the oppressive yoke of formidable extraterrestrial beings known as the "Amanto." These alien conquerors have quashed the once lofty aspirations of the samurai, leaving them seemingly unattainable. With the feudal hierarchy reduced to a mere facade and a feeble puppet government reigning supreme, a draconian law emerges, forbidding the brandishing of swords in public spaces. Yet, amidst this populace resigned to their fate, one man defies the constricting shackles of authority. Enter Gintoki Sakata, an idiosyncratic individual with shimmering silver locks, who defiantly wields a wooden sword, steadfastly clinging to his identity as a samurai despite the strict ban. As the esteemed founder of Yorozuya, a modest enterprise that handles eccentric tasks, Gintoki embarks on quirky and unpredictable missions to extend his helping hand to others. Assisted by the sharp-witted Shinpachi Shimura, a studious youth donning spectacles while treading the enigmatic path of the samurai; Kagura, a spirited and tomboyish force of nature blessed with prodigious strength and an insatiable appetite; and Sadaharu, their colossal canine companion who delights in playfully nipping at unsuspecting heads, the Yorozuya stumble upon a mesmerizing tapestry of encounters. Within the ever-evolving vivacity of Edo, the Yorozuya confront a kaleidoscope of adversity, ranging from cosmic royalty to skirmishes with local ne'er-do-wells. As they navigate this volatile world, they forge ahead, their souls like unyielding blades slicing through the murky haze of uncertainty.

Now that you know the argument, take a look to another songs of Gintama also called Silver Soul | Gin Tama | Yorinuki Gintama-san | 銀魂