Genres: magic, modern knowledge, kingdom building
Alt Name: Release that witch
A modern-day engineer is transmigrated to a different world into the body of the fourth Prince. His surrounding reminds him of medieval Europe but it’s not quite same.
In this world demos and witches who can use magic actually exist. To save the witches and solve the demon conspiracy he uses his modern knowledge and with the help of witches he makes lots of modern and powerful weapons.
In the kingdom no one likes the forth prince, to prove his worth to his family and people he uses his knowledge of the modern world to make people life easy and safe.