The Forgotten Prince [BL]

"Once upon a time..." 'The Forgotten Prince' was the title of my mother's favorite book. She had read it to me every day ever since she was hospitalised when I was a young boy, and I had kept it with me and read it countless times after her death. It was one of my only momento of her other than the faded black and white picture of my family of three. But what I didn't expect was that I would transmigrate into the book. And that I would have a cheat-like system to assist me. Now I can finally fulfill my wish of being a knight and saving the prince!  Wait, stop touching me, you perverted prince! What naive and indifferent prince! This forgotten prince clearly knows what he is doing! Hey! Stop touching me! (Cover picture not mine)