Wonderful Insane World - Chapter 18: Soul and Flesh

Ethan wakes up expecting to see the walls of a hospital room—only to find a system message blinking in front of him:[Ding! You have killed a green worm][Ding! Green worm has been added to your summoning list]

A new emperor rules each year in Yohuachanca.Only the most delicious of food graces his palate; the realm’s most beautiful women fill his harem; his palace dazzles the mind in its beauty; and four priestesses counsel him in all matters. The life of an emperor is good, luxurious, and short. For at the year’s end, he is sacrificed to the Nightlords under the light of the Scarlet Moon.I am Iztac. A pisspoor orphan and the year’s emperor. A sacrifice bound for the altar. But the vampires have made a mistake this time. For I am a sorcerer, whose soul journeys into the secret underworld to plunder the secret spells of the dead. There, in the darkness, hides the power to drag the Nightlords off their throne. I have a year to find it, or perish for good.I may not be the first emperor, but I will be the last.

A man was transported to Ancient China and eventually became a servant of a declining household without a male heir. He utilized his wits and modern knowledge to help the household and eventually become trapped in the sea of political turmoils of the period.

- Description from Novelupdates

[Tower Defense & Dungeon Attack RPG] I saw the ending to the game no one was able to clear.

But, when I came to my senses, I was inside of the game.

In fact, I was in the tutorial stage, a place where strategy was impossible.

“I’ll clear this bullsh*t game no matter what…!”