Munou no Akudou Ouji wa Ikinokoritai: Renai RPG no Akuyaku Mob ni Tensei Shita Kedo, Gensaku Mushi Shite Saikyou wo Mezasu

"Brace yourself, Protagonist. With this power, I will create a new future." When I realized it, I was in the world of my favorite romance RPG. However, I was reincarnated as Harold, the "Useless Evil Prince," who breaks off the heroine's engagement and meets a disastrous ending. Moreover, due to the setting, I cannot use magic at all and was just a minor character who gets defeated by the protagonist. But it is different this time. First, I will stop the engagement cancellation with the heroine and begin focusing on my own development. Additionally, I will acquire weapons different from those in the original story and use my vast magic power that I couldn’t utilize before to overwhelm my foes! In my pursuit of strength, I inadvertently become a figure of interest to other heroines as well...