[ Reborn in a fantasy world ] , only to find my Mental Points (MP) constantly draining away! My only path to survival is to use my programmer's logic to "debug" this world and engineer my own solutions. But this dark elf girl who stays by my side... why is it that just by being near her... the corroding shadow in my heart seems to quiet down? A Message from the Author Umm…To be honest, this might just be another ordinary reincarnation isekai novel... Or for those who have read Mushoku Tense...

Novel Synopsis & Introduction "I was just a gamer who knew a bit too much about history. Now, I've been reborn to guide a harem of exotic beauties (with fan service in every chapter), survive a brutal wilderness, cook gourmet food, and overturn an empire's political game!" Prepare for an epic that will shatter every trope you know! "Reborn as a Guide with the Four Imperial Eras System" - (The Isekai Guide: Four Imperial Eras) is no ordinary isekai. It is a fusion of legendary medieval fantas...