The protagonist dies in a library that caught on fire and get's transmigerated to a world where the church burns anyone that learns or uses magic... He secretly learns magic while creating an alternate identity for himself as a musician bringing music scores like bumble bee and requime to the society, he also 'invented' the piano. In the end, he becomes super powerful, combining modern research to magic and destroying peoples beliefs along with their magic domain. He defeats the church god using one of his thesis in the end and lives happily ever after with his knight girlfriend that used to be a lesbian and princess. Who can help with the name of the novel?
Forgot the name of a good novel
