Honestly speaking, I was about to drop this series on my anime list because episode 1 & 2 didn't really "live up" to my expectations. I waited for episode 3 to come out and based on that episode, I still kept it on my anime list. The first 2 episodes wasn't really that exciting to watch and was sort of disappointing for me, but when I watched episode 3, my oh my, everything changed.
As you've seen on the first picture above, Atsushi-kun was laying on the ground with a pool of blood beneath him, why is that? Well, because on episode 3 (spoiler alert) his right leg gets cut. Before this, Atsushi-kun and two other comrades were assigned to do a stakeout mission, just a simple job, until their client revealed that it was them whom they were after.
A simple job became a blood bath. This is where Akutagawa (the main antagonist) comes is and tries to take Atsushi with him (because that's their true objective), unfortunately for him, Atsushi resists and transformed into his Tiger from and you know what happens next.
As you would see in the screenshots, Dazai comes in and stops the ongoing battle between Atsushi and Akutagawa. This is where things get interesting for the plot because Akutagawa mentions that Dazai was a former member of their group. How will Dazai respond to this? We'll find out in Episode 4! :D