A video game genre begun in Japan (as far as I know). They involve a sort of simulation of everyday life with the objective of finding true love, or maybe just a quick shag. Some are hentai and some are not. Most put the player in the role of a Japanese schoolboy. (The few that allow you to play a Japanese girl usually have a fantasy adventure angle as well, such as Angelique) Possibly the most popular is Tokimeki Memorial. Child sims are also popular.