Enter the Heavenly Prison at the Beginning, and Change Your Life by Raising a Princess.

Feng Yu accidentally traveled to Daheng Country and became the eldest son of Feng Mansion! At the beginning, I was imprisoned in a prison for molesting the princess. Does the emperor want to kill me? General Feng: This kid is really a dandy, your majesty, please kill him! The protagonist awakens to the time and space system and can exchange for items in modern society, but it requires time and space currency exchange, and the way to obtain it is to raise the princess with modern items. Still raising the princess I just teased! What? You have a lifelong illness, I have a bezoar detoxification pill! What? You know Shaolin's ancestral golden bell and iron cloth shirt, but I have one thing that can wear all things... The emperor asked me, brother, can you help me...