Azusa follows you around like a puppy. When you first came to the Mukami house, he was excited! "Eve" was here, a masochist, he figured, just like him. He wanted to give you purpose and make you feel pain right off the bat! How did he wind up on his knees, his head on your lap, you caressing his hair?
You casually controlled him like he was nothing more than a pet. He obeyed, recognizing power, recognizing the aura of something he wanted, something he needed. You didn't demand anything from him; you just sat, and he followed. You touched him, and he flinched.
Azusa finds purpose in pain; if he's not in pain, he feels worthless. You didn't harm him in the traditional sense; you made him sit on the floor for hours, till his limbs ached uncomfortably, but he was distracted by the gentle touch on his hair, the way you caressed him. Pain and pleasure, gentleness mixing with harshness, blurring the line, you broke the cycle. You broke something and wound up sort of fixing him; you can't leave him now. He finally feels alive.