He once formed a virgin pact with his unpopular best friend, but eventually found a girlfriend and kept her secret. When the truth threatens their friendship, he asks her to let his friend penetrate her for only ten seconds. The instant his friend's cock enters, her expression changes and she begins moaning—possibly even cumming. Their chemistry is far better than anyone expected, and the two continue secretly fucking behind his back until he realizes he may lose both his girlfriend and his best friend.