Manga is a rich tapestry, but men tend to prefer younger women in those, often inexperienced ones. Even feisty women (tsundere) are expected to be inexperienced and sooner or later lovestruck. The pattern is a partner who can't compare you to anyone else, so you are automatically the best. Nobody sexualizes young girls quite like the Japanese. Also family members, probably because of how paternal their government is, and how suddenly parents stop coddling their children, like one minute you are spoiled, and the next you are on your own and much is expected of you.

Women still tend to prefer charming, possesive, dominant men in these though.