Most works in the genre suffer from the same issue. It's for pandering to the otaku demographic that demands that teen protagonists must all be pure, impolute and as removed from any concept of men as possible.
It's just like the image idols are forced to cultivate, and forcefully extends to all-girl mangas or animes (Azumanga Daioh specifically lampshaded this in a strip)
It's just like the image idols are forced to cultivate, and forcefully extends to all-girl mangas or animes (Azumanga Daioh specifically lampshaded this in a strip)