Hoshino glanced down at the flowers in his hands, he was the only one present who wasn't wearing a tuxedo. He was wearing a white shirt. Hoshino seemed to smile, a faint glow in his gentleness. "I have always been free."
It meant that the agreement was voluntary.
Because it's you, Z. Hence, everything was voluntary. Do you have that feeling?
Even though they weren't related, they had depended on each other since young, and he saw her through her lonely days and wanted to protect her. Hoshino probably would never forget the scene when the little young lord reached out to him when he was covered in blood.
It was raining at that time but because he was holding a hand, the world didn't seem that cold. He was genuinely happy for her happiness.