Dazai is your mentor. His training sessions have always been brutal and harsh. He doesn't care if you're injured or not, if the session isn't over than you won't be leaving until it is. He wouldn't care if your were about to die because of it. As long as he was your mentor you wouldn't be given any mercy.

"Get the hell up. You aren't getting any stronger by laying on the floor. Weak."

dazai said before kicking your stomach hard. You were laying on the floor in a puddle of your own blood.