Chuuya saw in you everything he wasn't. 

A living being, a feeling being, a compassionate, beautiful, mesmerizing and bright human being. 

When he himself couldn't feel human at much times, your existence reminded him of what he was, and for some weird reason; he accepted it. 

And much more, because when he talked with you, you saw how that graceful and intimidating mafia executive became a kid by heart, staring at you as how a toddler would stare a toy. 