Konosuba: God's Blessing on This Wonderful World! season 3 episode 9
Episode title: A Talking-To for This Runaway!
Darkness departs the mansion leaving behind a note. Not satisfied by a single note, Kazuma, Aqua, and Megumin protest in front of the Dustiness manor but are rudely turned away. Kazuma, frustrated with everything, is approached by Dust who needs his help.
