They are also sometimes put under the category of neoromance.
Homosexual relationships are also possible, as there are games with no specific gender lines ("all pairings").
There are also GL games, which focus on female/female relationships, and BL Games, which focus on male/male pairings.
The game lasts for a fixed period of game time, such as one month or three years.
When the game ends, the player either loses the game if he failed to properly win over any of the girls, or "finishes" one of the girls, often by having sex with her, marrying her (as in Magical Date), and/or achieving eternal love.
This gives the games more replay value, since the player can focus on a different girl each time, trying to get a different ending.