91 Days: Shoal of Time is a oVA anime that premiered in spring 2017, produced by Shuka.

About the production: the story comes from an original script, there is 1 episode of about 24 minutes and its current status is "finished".

Its main genres are action and drama, with themes such as Mafia, Historical, Assassins and Anti-Hero.

On AniList, 91 Days: Shoal of Time has an average score of 67%, a good score, and appears on 19,472 users' lists.

The "Day 13" episode will contain three stories. The first story, "Toki no Asase" (Shoals of Time), will center on Nero and Vanno persuading Frate to skip mass with them and see the circus. The second story, "Subete no Kinou" (Yesterday Before Everything), will focus on Ganzo, as he meets a young man named Vincente at a bar, and asks Ganzo to do something for him. The third story, "Ashita, Mata Ashita" (Tomorrow, and then Tomorrow), is set after Nero and Avilio defeat Mad Mack and are on the way back to Lawless. Nero suffers from fever dreams, and Avilio nurses him back to health. (Source: Anime News Network)

Official synopsis from AniList.