Gintama
銀魂
The samurai didn't stand a chance. First, the aliens invaded Japan. Next, they took all the jobs. And then they confiscated everyone's swords. So what does a hotheaded former samurai like Sakata "Gin" Gintoki do to make ends meet? Take any odd job that comes his way, even if it means losing his dignity.
(Source: VIZ Media)
Included one-shots:
Volume 1: Dandelion
Volume 2: Shirokuro
Volume 24: 13
Volume 38: Bankara-san ga Tooru
Volume 41: Special Lesson.