Ecstas Online. Kakeru Meguri is a second-year student at Minami Myojin Public High School who plays the character named Hellshaft in the VRMMORPG. One day, a player unforeseen appears before his eyes, which turns out to be his famous beauty classmate, Ririko Asagiri. She feels that if they really destroy the demon lord they would be able to return to the real world, Kakeru knows that if a player dies in the game their presence of the real world will disappear. Kakeru possesses the most powerful banned force, "Awaken Adult Mode," to save a significant individual.