Toaru Majutsu no Index - Volume 4, Prologue: Parallel World in Real World.

His friend and his wife betrayed him. The only thing left to him was his massive debt and his precious daughter. He was without hope as he lived at the bottom. However, a last chance had come to Sungyoon. He was a ‘man without a heartbeat’, and he will explore the Moon’s Labyrinth. He’ll explore the parts of the dungeon yet to be seen!

Sen, the last and most powerful dragon left roaming the skies causing chaos and destruction across the land. When all hope is lost the human race call upon their last hope, a powerful witch. Unable to destroy the dragon the witch uses the last of her power to cast a spell. Sen has not been defeated but has now been reborn as a human.

There was neither Fighting Energy nor magic, only tamed beasts that had reached the pinnacle of evolution!After transmigration, Chen Mo awakened the talent of the Entry Training Manual, which allowed him to bestow various entries on spiritual beasts or himself by completing challenges. As a result, one after another, scientifically impossible spiritual beasts were born.[Lord of Thunder and Lightning·King of Thunder·Hardworking· Fox of Reincarnation] Nine-Tailed Celestial Fox with Super Electromagnetic Cannon.[White Angel·Battlefield Doctor·Ministering·Best Support] Great-Sea Whale, the Sky Fortress.[Pastry Master·Master of Culinary Arts·Gatling·Marksman] Spirit of Glutinous Rice Balls.[Late-Night Delivery Guy·Night Judge·Soul Switcher·Wish Merchant] Bringer of Misfortune from Urban Legends.[National Beauty·Enchanting Beauty·Idol of All·Seductive Temptress] Personal Maid, the Queen of Succubi.From then on, Chen Mo embarked on the advanced path of becoming a beast-taming master!

What happens when a genderless Artificial Intelligence who is proclaimed as one of the worst in mankind's history travels back in time from the unreachable future to the modern day and makes himself a true living body?