The Strongest Adventurer from Another World

Another world As the name suggests, it is the world that two-dimensional people look forward to But you said it was a coincidence that this good thing happened to me, but it only hurt so much After overcoming the pain, what greets us is a new world - a different world Go to another world? I spent the first 15 years in a state of selflessness Reborn? Awakening my past life memories 15 years later It's amazing, I am the strongest adventurer in another world! Knights, brave men, demon kings, guilds... (There may not be a harem setting, but I will also write out hundreds of millions of harem elements)