I like Idolmaster SideM as well - it was the first male idol game I liked.
In fact, I tried generating images of Saki Mizushima on NovelAI before realizing he didn't have enough images on danbooru so it just generated random girls instead.
Some models don't allow you to use them on CivitAI, but you can download and use it on your local stable diffusion service.
Thanks to all of those who trained these!
Available (SD1.5):
FRAME
Café Parade
Mofumofuen
Available (SDXL):
Jupiter
W
Kyosuke and Yusuke Aoi (Redyaan)
FRAME
Seiji Shingen (originally from PixAI)
High×Joker
S.E.M
Café Parade
THE Kogadou
Takeru Taiga (pjGuy240) (originally from PixAI)