Hay can you age up the silhouette for the main character. I just think its weird that he looks like a little anime child. There are plenty of silhouettes you can use to make the protagonist look young but not like a little kid. I sincerely hope you age up the protagonist, because it looks a bit sus in a game tagged as being erotic.
If you looking for more of a logical appeal then I think you should change the silhouette based on advertisement. Not everyone likes the idea of touching Freddy's "chest" while looking like someone fresh into middle school. If you decide nobody will care/notice then your basically putting a marketing cap on your project. "This game has me flirting with girls as a person who looks like a minor so i'm going to go play a differnt game."
Another logical appeal would be to distance the weeb community from pedophiles. People like Ayano Aishi (a.k.a yandere chan) don't paint a positive picture for you guys, and i think it would be in your best interest to avoid any accusations before they actually come.
Remember, I'm not accusing you of having bad intentions. I'm simply suggesting that you made an artistic choice which, from your point of view, seemed to be in good taste, but to others, it may come across as being in poor taste.