Lesson of Passion is an adult-brand video game company began by Leonizer. The site originally started out with using famous models and adult entertainment actresses, until the introduction to the 3D/2D model concepts that are featured on the websites today. Most games are playable online through web browsers via a built in Flash.

Lesson of Passion, or LoP, have several websites in their name ranging from Free-to-Play games to Pay-to-Play sites that requires a subscription to play some games. Though they are all part of the LoP label, many websites require separate subscriptions to sign-in.