While male idols are most likely not going to be officially added to Idol Manager by the developers, there have been a few projects run by players to try and convert Idol Manager into a male idol group sim via mods. As the team behind the game keep making improvements to the modding tools, a full game conversion to male idols (including sprites, story, dialogues, etc.) starts to become more achievable. It'll only be a matter of time before someone officially announces a full conversion of Idol Manager. For now, you can try to mod your own files to see if you can add male idols to your game.
