Mahjong Lemon Angel is a mahjong game disguised as a high school romance. The player takes the role of a male exchange student who is determined to find a girlfriend, putting an end to his lonely feelings in the new town. The three love interests in the game are Tomo, Erika, and Miki, characters from the TV series Lemon Angel, which are based on real people. The player can either choose to play through the story mode (each girl having a separate story), or compete against any of the three girls in mahjong directly from the main menu.