The VR game GM, Mario, has a new target: his cheerful and popular-with-everyone childhood friend, Saya Natsume. Saya, having logged into the game as a female hero, is bewildered by the revealing bikini armor she's equipped with, but faces off against a tentacle-wielding monster. However, she's quickly immobilized and experiences her first orgasm from the tentacles groping her entire body! Her armor melts away, exposing her naked body, and then comes her first insertion...