While everyone can question how youthful the characters look (always a problem), this company specializes in GL (Girls Love) scenarios, usually 16-18 year old girls falling in love with other girls, and based on a quick scan through their portfolio, almost exclusively in a "work safe" format (due to the audio CD only format). Not really any "eroticism" in it, it's mostly about high school girls working through their feelings in a society that frowns upon same sex relationships, with the CDs typically featuring somewhat notable voice actors playing the girls. Pretty typical for a Drama CD (something japan still seems to love).
This seems like their first attempt at a visual novel format instead of just a pure audio format, and given the scrutiny Steam has been under recently, not shocked they're giving this the side eye.
I can't speak to what the target audience for this stuff is, but the lack of actual "porn" content in it lends me to think this is more for women than men. It's still not great that it sort of fetishizes gayness in a way, but at the same time acts as a means to normalize it.
