The man who takes care of Fuji and also the one who named him. He lives alone and loves cats.
Hiro has a lover who is very violent and often beats him or forces him to have sex with him. Not knowing that the naked man he found in the garden is, in fact, Fuji, he still treats him gently and appears to fall for him.
After being protected by Fuji (in human form) in a fight with his lover, they break up, making Fuji think that he has done something unnecessary. However, in the end it looks that Hiro knows that his cat turned into a human and accepts it, loving him already. Later, he'll teach Fuji how to speak the human language.
He is played by Kamiya Hiroshi in the Drama CD.