Crimson Gem

In this game you play as a half breed kid who can barely speak English. His father is American and mother Japanese. His life is boring and he spends his time online playing games. His parents are away as usual and it is his birthday. This is the loneliest boy in the world. Then he gets a message that his parents have left him a birthday gift in the house. It is a rock! A rock?? WTF? But as he soon learns, this rock is the crimson gem of desire and it summons a lovely young lady who then tells him she will be fucking him and teaching him how to fuck properly. This birthday just got a whole lot better!