Being OP in Anime Worlds

Rei Tetsuya, a genius who invited the cure of cancer is now 80yrs old. he lived all his life in his Laboratory whenever he gets free time he watches famous Anime,Novels,Manga now that he died, God gave him another chance to live a new life in famous Anime worlds with 10 wishes each world. ****Disclaimer:- i don't own any series and its characters mention in this novel ENJOY!!! SCHEDULE:- 4-5 CHAPTERS A WEEK