The fact is that at the moment, the game contains something that is interesting to many guys (18+ scenes with naked girls, without other men, except for monsters), or girls who love F/F relationships. And the scene you mentioned with Liam is more of a joke.
M/F romantic relationships are more interesting to girls who like the so-called classic types of relationships. Therefore, the game ignores more like their interests. Because sex with monsters is difficult to compare with the beautifully written scenes between Nel and the other girls. Therefore, at the moment, this game is more for both guys and lesbians. This is not bad, it’s just that M/F fans will have to look for other games, because M/F is unlikely to appear in this game soon, in sufficient quantities.