Nothing much, really. There’s two suggestive CGs (probably the “””“worst”””” things in the whole game in regard to “suggestive” content, please note the quotation marks) containing what you’d expect from basically any early 2k japanese game.
Spoilers
A mild panty shot CG (unavoidable, story event), and a spring bath CG with a girl covering herself with a towel (avoidable to an extent, you could just choose not to take a bath).Everything else falling under the “sexual themes” umbrella is basically conveyed through text, and it’s not explicit, either. Essentially (and trying not to spoil much here), it’s stuff like mentions of character X fiddling the diddle with character Y without going into any detail, and then left at that.
To be fair, people have played games with far more suggestive images and text on twitch before (this is fairly innocent all things considered). I personally think it should be fine, but I’m not really an authority, so take this as merely a personal opinion from the person running the account at the moment.