91 Days is a Japanese anime television series animated by Shuka. Set during the United States Prohibition era, the series follows Angelo Lagusa and his quest to seek revenge against the Vanetti Family. The series aired from July to October 2016.
 The story is set in the United States during the last years of Prohibition in 1932, where brewed liquor dominates the black market thanks to the Italian Mafia. Angelo Lagusa, a young man whose family was murdered in a Mafia dispute, seeks revenge against the Vanetti Family, particularly its Don, Vincent Vanetti which is the Mafiosi that controls Lawless district, and one of the high ranking members of the Cosa Nostra. After seven years in hiding in the Midwest following the night of the murder, Angelo receives an anonymous letter from a friend of his father's, prompting him to return to Lawless and exact his revenge. Under the name of Avilio Bruno, he begins to infiltrate the Vanetti clan by slowly befriending the Don's son, Nero. However, in this dramatic 91-day story, revenge breeds revenge, and killing may yield drastic consequences. How will Angelo Lagusa and Nero Vanetti fare, in this tragic harvest field that they have only begun to sow?
 The Vanetti Family originates from Savoca, Sicily. When Vincenzo Vanetti immigrated to USA, due to the economic crisis, he dreamed of building an Empire that he can rule. He got Made in the Moreno Family through Ganzo Alari. He served under the Morenos for years, which had Lawless district and West Chicago on their palms, but the Morenos and the Galassias didn’t get along with each other, and Vincent took the opportunity to increase his own power by dealing with the Galassias in secrecy with Alari's help, but Don Moreno’s accountant, Testa Lagusa found out about this. In April 1925, Vincent killed Don Moreno and the Lagusas to keep the knowledge from being leaked out. For the last several years, the Vanettis were the most feared and respected Family alongside the Galassias, but with Vincent getting sick, the other clans began to rise, and that made the Vanetti authority begin to fail.
 Don Orco used to be a member of the Moreno Family, but situations made him split from them. Since then, he became another Mafia Boss that made the streets of Lawless a bloody path. Not only they are rich but their name makes people afraid for their lives. Tactics, Anger, Prestige, and plans that are difficult to trace, can be found in this violent crime outfit.
 The Chicago Outfit that controls Chicago's underworld and tries to grab hold of Lawless. Their feud with the Moreno Family led to the conspiracy that murdered Don Moreno and the Lagusas and created the Vanetti Empire that ruled Lawless for 7 years. They try their best to turn the Vanettis into their puppets. The Vanetti and Orco families are not strong enough to go against them and often comply with what they ask.
 Testa Lagusa was a member of the Moreno Family, even before Vincent and the others. He was extremely loyal to his Don, which by the time they controlled all brothels, bars and black market of Lawless. But with Vincent's betrayal and Galassia's rising influence, Testa and Moreno were murdered by the Vanettis. But his only legacy for revenge, Angelo, makes the story longer for bloodshed.
 The anime was announced in March 2016. It is directed by Hiro Kaburagi and written by Taku Kishimoto, with animation by the studio Shuka. Tomohiro Kishi is designing the series' characters, and Shōgo Kaida is producing the music. The opening theme song, "Signal", is performed by TK from Ling Tosite Sigure, while the closing theme, "Rain or Shine", is performed by ELISA. The series was broadcast from premiered on 9 July to 1 October 2016 on TBS and also aired on the Animeism programming block on MBS, CBC and BS-TBS. The series was simulcasted on Crunchyroll, with Funimation handling dubbing and distribution of the series in North America.
 Strega's men kill every Vanetti in sight and the Vanettis are not strong enough to survive the war. Nero finds out where Angelo is and kidnaps him from Strega's bodyguards. After explaining everything to Nero, they leave Lawless with Cerotto and Nero takes this opportunity to steal his car. Angelo and Nero take a trip to see the Atlantic Ocean against a backdrop of warring families and a dying empire. Nero asks Angelo if he is satisfied with his revenge, to which Angelo replies that it didn’t give him the "raison d’etre" that he hoped for and it was all for nothing. Nero reminded of his father's last words becomes enraged and beats Angelo and asks why he didn’t kill him, to which Angelo responds that Nero should have killed him on the night of his family's massacre. After spending a few days travelling and trying to find a reason to forgive each other, Angelo tells Nero that the only reason he is alive is because he didn’t want to kill him. After hearing this Nero shoots Angelo in the back and leaves him on the beach. While driving away, one of Strega's henchman notices Nero in his car without Angelo and then finds him to take him back to Strega and treat his injury. Angelo explains he killed Galassia to spark a war between both sides in order to annihilate the Vannetis. Strega then gives Angelo an offer to eliminate an unmentioned person to become part of the family, which Angelo accepts.