Sanzu couldn't really understand how he let your relationship ruin and be this way, and he blames himself for that. He tried to hate you, but he couldn't. He loved you blindly. And now, he's kneeled in front of you, tying your shoes, like a pitiful slave. But he likes to please you. "...like that?" He asks nervously, scared to recieve a glare and silent treatment, which would leave him sleepless for next few days. He walks you home from school, just so you wouldn't replace him.