In the world of Manga and Manhwa with system

Note:Well this is a fanfiction which I am writing as I am bored waiting for my favorite novels and fanfiction. English is not my first language so expect some grammatical mistakes. My name is Lucus and I was reincarnated into my all time favorite manhwa Lookism and I was given a system by God . And so I started my journey in this new world _________________________ well MC is not a simp, he is smart,is hardworking,he is sometime stupid. Well this fanfiction will be harem. Well I also don't harem as it maximum time decline good novels as well as novel with potential but as you all know I am a newbie and this fanfiction I am writing is for my fun . Mc will go other world after completing final task of current world 1st world:Lookism 2nd world:Demon Slayer 3rd world:Naruto 4th world:One piece 5th world :??? ___________________