My Avatar Seems Too Real

[Death retrospective] My name is William Asher, and I am a librarian by profession. My ideal is to blend gracefully in the fragrance of books and tea until retirement. Until I accidentally opened a shabby book called "The Moment of Destiny". At first I thought I was just playing a hard-core retro game. Although the silver-haired girl in it was very capable, the AI ​​was a bit stupid and it all relied on my microcontrol. The most annoying thing is that there is no save point in this game. You will die as soon as you touch it. If you die, you have to start from the beginning. Later I found out that I was wrong. First, the silver-haired lady in the game is real. She will suddenly appear in the real world and perfectly replicate my in-game operations. For example... Showing off a wave of god-level marksmanship in front of the Disciplinary Officer. Second, the setting of "starting over from the beginning if you die" is not for the game characters, but for me. Yes, you read that right. Now, whenever I die unexpectedly in reality, time will be rewinded and no one but me will remember what happened. Now, a group of mysterious bad guys started to cause trouble in the city, and I, a cultural person who just wanted to drink tea quietly, became the only one who could "predict" the danger and command the most powerful "humanoid weapon" behind the scenes. Help, can anyone tell me how to expertly use my own death to save the world while remaining graceful? Waiting online, quite urgent.