Toaru Majutsu no Index: New Testament - Volume 7, Chapter 3: ??? Agitate_Halation.

There lived an extremely miserable man- he suffered from a terminal illness. But one fine day, when he left his miserable body, a certain entity grants him another chance- another life along with few gifts to help him in his journey.The man is transmigrated into the body of a young man into an ancient society. Watch how the man lives his new life and conquers the world.[This book will contain R18 scenes but do not expect it to be the theme of the book. It will be mostly based on strategies and expansion of empire. A small advancement in the technology can also be expected.]

On the desolate barren planet of Rennes, an Asian teenager named Lin Yuan receives an admission notice for the Empire’s best military academy San Romia. So begins his life changing military school career.

Pinning her tall body against the hard wall, he looked into her beautiful emerald green eyes as he spoke in a deep voice, "I have two options for you," his body came closer to hers as he continued, "Be my girlfriend. Or," his lips turned into a sly smile as he whispered close to her ear, "Be my boyfriend." He even dared to wink right before her as his dark orbs glinted amusingly.

Sherlock is a new generation Dungeon Lord whose ambition is to become the greatest Devil King and building up the greatest Dungeon in the Underworld.