Hikaru Amatsuga's days of tranquility come to a sudden end when he rescues Alma, a mechanical arm crying for help. Alma fuses with his jacket, introducing Hikaru to the world of mechanical arms: mysterious, sentient weapons that normally become a part of their users' bodies. Forced to flee for his life, Hikaru is eventually captured by Aki Murasame, a twin mechanical arms user working for ARMS, an organization that protects the machines against unethical treatment. The Kagami Group, a nefarious organization that treats mechanical arms as mere tools, seeks to recover Alma. Hikaru is deemed a failure by ARMS for his lack of natural predisposition to be an mechanical arm wielder, so Aki is assigned to be his bodyguard. But Aki is defeated by Jun Kagami, who cruelly tears out her two mechanical limbs, condemning the girl to a slow death. Unwilling to abandon Aki to her grim fate, Hikaru miraculously awakens his power and neutralizes Kagami. Now a full member of ARMS, Hikaru is determined to unravel the truth about mechanical arms and protect his newfound friends and allies.

Takato Saijou has held the title of "Sexiest Man of the Year" for five years running. He is an accomplished actor, with 20 years of experience under his belt, and is aware his good looks are well above average. Proud of his career, Takato regards the title as an appropriate indicator of his success. But when his reign is ended by acting newbie Junta Azumaya, who debuted only three years ago, Takato's initial shock gives way to jealous hostility. Even in the new drama that he has been cast in, Junta seems to have suddenly surpassed him; snatching Takato's usual spot of lead actor, Junta continually manages to get on his nerves. Most infuriating of all are the bright smile and kind words that accompany everything Junta does. All this animosity comes to a head, however, when Junta catches Takato in a rather vulnerable drunken state. Endangering his own public image, Takato confronts the junior actor with harsh words and angry comments—an opportunity Junta takes every advantage of. With the famous actor Takato Saijou now on video picking a fight with a co-star, Junta has the perfect means to blackmail him. Asking the price of his enemy's silence, Takato is shocked to find that his motivation lies far from advancing his career; instead, Junta's terms are those that can only be realized in the bedroom! [Written by MAL Rewrite]

After a one-year hiatus, Shinpachi Shimura returns to Edo, only to stumble upon a shocking surprise: Gintoki and Kagura, his fellow Yorozuya members, have become completely different characters! Fleeing from the Yorozuya headquarters in confusion, Shinpachi finds that all the denizens of Edo have undergone impossibly extreme changes, in both appearance and personality. Most unbelievably, his sister Otae has married the Shinsengumi chief and shameless stalker Isao Kondou and is pregnant with their first child. Bewildered, Shinpachi agrees to join the Shinsengumi at Otae and Kondou's request and finds even more startling transformations afoot both in and out of the ranks of the the organization. However, discovering that Vice Chief Toushirou Hijikata has remained unchanged, Shinpachi and his unlikely Shinsengumi ally set out to return the city of Edo to how they remember it. With even more dirty jokes, tongue-in-cheek parodies, and shameless references, Gintama' follows the Yorozuya team through more of their misadventures in the vibrant, alien-filled world of Edo. [Written by MAL Rewrite]

Second part of Gokushufudou.