Transmigrated into a world full of hidden ninjas, masterful assassins, gargantuan beasts and plenty of megalomaniacs; Cole will have to learn, adapt and grow stronger, or the price will be costly. Knowing all the ins and outs of this world and having a mysterious power at his beck and call, does make things easier. (Contains a believable MC that doesn't get everything right on the first try; power-progression that won't give the MC godlike strength in the first 2 chapters; decent smut; and actual, readable text.)
The author included a OC named Kaori and the plot for it is really dumb. This OC clings on to the MC so much, that it makes this really annoying to read. Also the MC is a retard, and the gamer system is nerfed.