Tensei Shitara Koutei deshita: Umarenagara no Koutei wa Konosaki Ikinokoreru ka @COMIC

What would you do if you were reincarnated as a child emperor—kept alive as a puppet, with corrupt, greedy nobles sharpening their knives on all sides? How would you live with no overpowered abilities, no freedom to act, always one wrong step away from an assassin slipping poison into your next meal?

How about this: Survive. Learn magic. Purge the empire of corruption.

Sounds ambitious, you say? Well, no emperor ever made a name for himself sitting at home.

(Source: J-Novel Club)