The manga is a crossover with the OREN'S manga, which artist Yanse Kazu and Takahashi launched in September 2015 in Akita Shoten's Bessatsu Young Champion magazine. The OREN'S manga is set in the aftermath of a great disaster, and depicts the struggle for survival of men.
Takahashi's Crows manga ran for 26 volumes, and Digital Manga Publishing partially published its sequel manga Worst in English. Crows also inspired a two-episode anime OVA adaptation in 1994, titled Kōkō Butō Den Crows.
Source: Young Champion issue 28