Bungou Stray Dogs Wan!: Season 1, Episode 6
1 - 6: Dazai-san's Nail Biter / If Only I Could Express My Hundred Thoughts / Please Share! Armed Detective Agency!
Dazai tapes a sign on Kunikida's back as a prank, but it turns out that Kunikida was about to head to a meeting with some important people.