Gintama` (2011)
Gintama takes place in Edo, known today as Tokyo, which was conquered by aliens called Amanto in the late Edo period. The samurai of Japan fought the aliens, but after their defeat the Amanto placed a ban on carrying swords in public.
An eccentric samurai, Gintoki Sakata helps a teenager named Shinpachi Shimura save his sister Tae from a group of aliens who want to make her part of a brothel.
Impressed with Gintoki, Shinpachi becomes his apprentice and works with him as a freelancer in order to pay the monthly rent where Gintoki lives, as well as to know more about him.
In Gintama', Shinpachi returns to the Yorozuya and discovers his friends drastically changed during the break.
