Through the Gates of Possibility

A man who died of a heart attack reincarnates in the world he created with the help of an A.I. The new world, a fantasy world reminiscent of old Japanese novels, is dominated by monsters and magic. Armed with his sword and the power of magic, he sets out to survive and defeat his enemies, with the help of his fellow protagonist and A.I. companion. Together, they journey across the world, encountering various challenges and enemies, and growing stronger with each encounter. As they travel, they discover the mysteries of the world and the magic system, and eventually find the key to solving a key plot point. Through their experiences and adventures, they become more powerful, more confident, and more understanding of each other, forming an unbreakable bond that will aid them in surviving the harsh world they now live in.