Ayumi can't hide her joy when her shy son, Kenta, brings a friend. Her friend Sasaki is a kind and honor student with good grades, and is said to be trusted by her teachers. However, no one knew that Sasaki had a hidden face. Her friendship with Kenta is just play. Sasaki's real goal is to obtain Ayumi's body. In order to get hold of her busty body that unconsciously gives off charm, Sasaki moves to her action.
