Vigilante: Boku no Hero Academia ILLEGALS: Tokubetsu-hen

"Vigilante" has returned to Jump+! Back when Koichi, Pop, and Knuckleduster were still active in Naruhata, they receive a consultation from a girl about a certain problem. Could the existence of the illegal drug "Trigger" be connected to what lies ahead!?
(Source: Shonen Jump Plus, translated)