Ever since I read elsword : Time Trouble story were add (time tracer) faces his future self (diabolic esper) I've been interested in such stories : the novel ultimate antagonist is the future version of the protagonist (himself) "you know why you can't defeat me ? because I'm you everything you know I know and everything you did I know , after all we're both one and the same "
You mean the kind of story where the villain knows he's the future hero/final boss and still meets him face to face in his current helpless situations?
No the kind of story were the antagonist is the protagonist future self , the future protagonist go back in time and he's the ultimate antagonist in the story fighting against the protagonist .... I recoll a chinese mtled story where a protagonist faces his future self and his future self keep beating the shit out of him and prevent him from helping women or making a harem because his future self cause the destruction of the world and he have to repair the karma he did , something like the movie looper only ..... The one he meets is a villain
Spoiler: small spoiler time trouble add(diapolic esper) trying to stop add (time tracer) from making the same mistake as him