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…