Saigo No Worst summary:

The story takes place a year after the ending of Worst, when Sajima Yousuke and Miyamoto Sanmon are seniors at Suzuran High School.As of May 2018, the last work in Takahashi Hiroshi's Crows x Worst universe by the original author himself. A two chapter gaiden story about a younger generation of Suzuran's crows, released in 2015.