I am the protagonist of NTR novel

Kai was reincarnated into the novel that Kai read yesterday As a protagonist who got NTR by his harem. Even the last chapter is NTR end and no happy ending! But kai won't let shit like that get in his way! He will do anything to get stronger just to slap the face of the author who brought him here! *No NTR, no R-18 *** this is my first time writing a novel so there are bound to be a lot of mistakes But I will do my best to make you guy have a fun time when reading this novel Also, in the future I maybe add tag r 18 if you like but I still a newbie so don't expect anything from those scenes