A Hentai System in the World of Danmachi - Chapter 14 - 13 - Hestia, you can sleep in my bed.

The protagonist, a famous YouTuber known for playing the game trilogy “Tril Trilo Trilogy,” finds himself possessing the final boss of the game world.Before the release of the new instalment in the series, he receives an offer from the game’s developer to play a prequel, “Part 0,” which explores events that occurred before the first instalment. Since he is a fan of “Tril Trilo Trilogy,” he eagerly accepts the offer.However, through some twist of fate, he wake ups in the world of “Tril Trilo” in the dreadful body of the final boss of the trilogy, a character named Frank Wonderstein.

He became a teacher at the best magic academy in the empire.
….For being mistaken for someone else.

Shangjing Hospital’s intern, Xiao Yifei, stumbled upon some scandalous behavior from the chief doctor and subsequently faced the hostility of the chief, making his work life extremely difficult. Little did he know that shortly after, Xiao Yifei would inherit the legacy of the Jade Dragon Eye. X-ray vision, control, all within my sight. Lolis, beautiful women, all within my embrace. From then on, Xiao Yifei embarked on a life that was nothing short of spectacular!

Liu Ming, since he was young, lived in a savage prison named Savage Island where the prisoners aren’t controlled by any guard or security. When the island sinks due to “mysterious” events, only a handful of people survive – those survivors are then pursued by the government.

On the other hand at another place two practitioners are worrying about what will happen to them because the young master that they were supposed to protect had died.

Their young master looks nearly like our MC
What will happen?

- Description from Novelupdates