A guy named Mario is roped into being a Game Master by his dad, who works at a video game company. Not thrilled about it, he digs into the system and discovers that the sensations in the game can be felt in real life. Intrigued, he decides to experiment and zeros in on a shy girl named Koharu Takashina. Koharu dreams of becoming a charismatic, helpful character in the game—totally unlike her real self. But the role she’s slapped with? A prostitute. Assaulted by thugs in the game, her womb starts throbbing with desire, even though she’s still a virgin in reality.

Mario, the Game Master of the virtual reality game, sets his next target on his lively and popular childhood friend, Saya Natsume, who’s adored by both guys and girls. Logging into the game as a heroine, Saya is baffled by the bikini-style armor she’s forced to wear, which exposes much of her body. But then, she faces a tentacle monster. Easily immobilized and unable to move, she experiences her first climax as the tentacles caress her entire body. Her armor dissolves, leaving her naked body exposed… and then, she feels her first penetration…