The original light novel series of the popular isekai manga! To be reincarnated into another world with the promise of a "cheat" power is one thing... but to be reborn as a baby, and then left for dead after your royal parents think you're powerless?? That's another thing entirely! Now the newly-born Reinhart-or Hart to his new friends-must find his way through a dangerous world... but luckily he's got magic that's quite literally off the charts!