The possibility that Tsueno Mamoru was alive was quite high.
That was why he went briefly to Star Town right after Mamoru's death, and he wanted to check for himself. But in the end, he could not find any definite clues. He couldn't stay long just in case people found out he was there.
When he came back to Tokyo, he tried to investigate things here from his end. But it was difficult to do so with his busy schedule, so he had no choice but to halt the investigation.
When Sumire came here, and she vocally explained the other reason why she came here, Yuhi decided that he would help her.
Mamoru's death was odd. He and Sumire were not the only ones who thought that way. When Atushi found out he was investigating, he also joined in and commented on the same thing.
"Did he save you?" Yuhi did not question her, but instead, he asked her another question.
