Hiroyuki is the main male character and has a very dry attitude. He is surprisingly empathetic though, but usually shows it through his actions rather than what he says or how he acts towards people.
Hiroyuki is also a childhood friend of Akari and lives alone, as his parents are away for work.
Note: Hiroyuki Fujita is the default name at the beginning of the game. His voice actor is only for the anime: in the game, he is the player and thus unvoiced.
Humorously, in the first episode of Comic Party the main character, Kazuki has a dream in which he is placed into Hiroyuki's shoes. Kanon's main protagonist Yuichi Aizawa in 2006 was possibly based on him as they have similar attitudes and look almost identical.