My name is Konrad, and I transmigrated into the body of a young man who died on his 18th birthday for no explicit reason, and all that was left was his blown-out head with no bullet or gun, a sickly body with no sickness and a strange book that lay on his desk covered in blood.
The open book contained a message on one of its only written pages
"You have seen what you should not see and done what you should not have; therefore, your life shall last for only 13 months."
And under these circumstances, I took it to mean that what it thought I only had a year left to live, calculating using the lunar months, and my only aid was also found only in this strange book, the book titled "The Legend of Nightmare" by Ana V.
This book, from what was on its preface, has the power to make everything I write come into existence, but at the cost of something of value, whether it be an action or a sacrifice for what I desire.
'Guess he died from using it?!'
The world I find myself in seems to be a parallel universe to my former one, filled with monsters, spirits, and entities that are... everywhere and furthermore, I learnt I can only increase my lifespan by taking that of others.