The first time Shunsui sees Ichigo, he's a baby with soft orange hair, being held proudly in his mother's arms. He's wide eyed and looking right at him, and he smiles. The second time he sees Ichigo, he's still a baby. He's quiet and pale, and covered in so much blood. Isshin dies alone, knowing that Shunsui would do anything to save his son. Young!Ichigo.
He should have known, should have planned for his crimes to be punished. Yet he hadn't. And there he sat, gripping his throne and waiting for the man he killed to retrieve his crown.
"Who sent you." Shippo paused, feeling as if there was a heavy weight in his answer but unsure why. "A-a Kitsune" he stuttered out. Her eyes narrowed fiercely and he gulped. Thinking his answer was insufficient he added "A golden kitsune…" he trailed off. "She had all nine of her tails."
Shunsui just coulnd't understand why Ichigo didn't run.
It took him a while to heal, but he was alive. From the moment he woke up he only had one name in mind, Saitama. (I'm terrible at summaries)