There's ~200 games with more pages of discussion, more than 600 with more views, and thousands with more reactions to the thread opening, all this for a five years old game. But yeah, sure,
Black Souls II is one of the most popular games...
Games like
Our Red String or
Straitened times have had more than three times more everything during the same time, and I don't even talk about
Grandma's house (4.5 times more reactions, 3.8 times more pages, and more than 6 times more views), that is one and half years younger and actually popular.
This being said, yeah, the girl looks barely pubescent,
but unlike you I know the rule 1.7 and will quote it, putting a small bit of emphasis where it's needed:
"Content (a game, image, video, story, animation, etc.) depicting nudity, sexualization or sexual/erotic activity involving prepubescent character(s) is prohibited. A "prepubescent character" is one that visually shows no sign of puberty, or if non-visual is otherwise clearly intended to represent a prepubescent character.
2D and 'unrealistic' depictions are generally looked upon more favorably. As this involves some discretion, if you are unsure ask a Staff Member.
- This includes translations, bug fixes, etc for banned content."
Chick is a drawing
(2D part, check) depicting a half-human, half-chicken
(unrealistic part, check), that have near to no other
(if not "no other", my memory isn't anymore what it used to be) sprites that the one you shown;
facial expression variations not being counted. Therefore, yes, there's sexual interactions with this character, but so little to see of the character and the said interactions, that it's totally unrealistic 2D representation, as well as it's marginal presence in the game, are enough to trigger the "looked upon more favorably" exception.
I know that we are on a forum full of porn, but sometimes one need to forget about his boner and let blood flew back to his brain.