Some Japanese dating sims may allow the player to have romantic or sexual relationships with characters in their teens.The degree of sexual content varies, but may often include intercourse.
There are many variations on this theme: high-school romances are the most common, but a dating sim may also take place in a fantasy setting and involve such challenges as defending one's girl from monsters.
One game series that often includes dating, with the goal of marriage, is the farming sim series Harvest Moon.
The subplot of dating is more focused towards choosing one of several girls or guys (dependent on the player character's gender) and offering them presents or joining them on events in the game.
The Star Ocean series of RPGs also feature dating sim elements in a similar manner.
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