In a two-minute preview video for the upcoming collaboration CD with the Kakushigoto anime, the five-original members of the unit Zetsubou Shoujo-tachi from the Sayonara, Zetsubou-Sensei anime are confirmed to return to perform a new song "Arekara" (Since then) under the unit name Zetsubou Shoujo-tachi 2020. Check out their new songs after the jump!