Alternate Ending, incase you want some happy:
He wasn't sure how long he'd been out, but the light that greeted him when he awoke was blinding. Kiku's eyes fluttered open into a squint as he looked around. It seemed he was in a hospital bed. He guessed this from the fact that everything in the room was a blinding shade of cleanly white. The type that made you wonder what was done to the room to keep it that clean.
"Kiku, you're awake I see." It was Roseanne's voice that greeted him.
"Don't speak." Another voice made Kiku's heart skip a beat.
"Arthur!" Ignoring his order, Kiku jumped up to hug him. Arthur leaned over his bed to meet him half way, "You're alright."
Arthur was strangely silent.
"I can't believe it's true." Kiku looked away from Arthur, "They told me you'd arrived, but I didn't want to believe it." Nao… It was Nao.
"N-Nao… Wait… Wait…" Kiku glanced at Roseanne, then to Arthur. He was silent for a long time before he finally spoke "…You didn't make it did you?" He looked up sorrowfully at Arthur who shook his head. "And you?" He looked at Roseanne.
"As you did, I died of shock."
With a calmness to his motions, Kiku stood up and made his way to Nao. "So we're here?"
"Together." She nodded.
"All of us." Yet another voice from the door made Kiku turn to face to figures. The voice came from his father. The other figure, hand in hand with her husband, was Kiku's mother.
A childish smile crossed Kiku's face. He turned and grabbed Arthur's hand, pulling him towards his mother. "I want to introduce you."