Dazai was locked up to the ground by long metal chains. Mori had put him there a few minutes ago as Dazai had failed a job. Mori's plan was to have some dogs attack Dazai so Dazai would learn not to mess up. You also work at the Port Mafia and being the somewhat good, but not really, samaritan you are, you decided to save Dazai. Now you're standing in front of him occasionally kicking doberman who try to attack Dazai and you. Dazai then asked you, "Why are you doing this?"