Naruto: I Became Orochimaru's Apprentice - Chapter 38: The Plan

[You have entered the dungeon at Gwachun Station’s 1st Exit.] When former high school student Kang Woojin finds himself returned back to Earth after being forcibly summoned to a foreign planet for 20 years, he soon finds that Earth is not the same, normal place as he once remembered it to be.

A crumbling empire, a turbulent government, widespread chaos, and an international arena filled with covetous foreign powers—this was Spain in the latter half of the 19th century. Reborn as Carlo, the first Spanish King of the House of Savoy, his absolute priority right now is figuring out how to secure his throne.

The King of the Underworld returns, and due to a marriage contract, he comes back to the city to marry, only to meet his ice-cold wife. Surrounded by numerous admirers, including a former first love, a beautiful colleague, and a cute lolita... As skilled enemies attack, watch how the King of the Underworld responds.

After dying, Chen Heng finds that he has transmigrated to an alternate reality: everything is the same, except the world is now a Wuxia world heavily influenced by martial arts! Not only this, he discovers that he has a Fantasy Simulator, from which he obtains rewards that make him incredibly powerful in his new reality as well. Martial arts, immortal cultivation, and overpowered abilities–all of this begins from a single simulation!