俺と彼女が下僕で奴隷で主従契約 | Ore to Kanojo ga Geboku de Dorei de Shuujuu Keiyaku
Author: なめこ印 | Namekojirushi
Illustrator: よう太 | Youta
Fujima Fantasia Bunko | Kadokawa | Complete in five volumes.
BW series pagePublisher series pageMAL
I love villainess stories and it's interesting that her power gets nerfed, I haven't read a lot of LNs where the MC's power goes down after being sent to their second life
Even if we assume that the average lifespan in their other world is 50 years, that would be 500 billion years. That’s thirty-six times the age of the universe.
How the hell could he retain memories of all that and stay sane?