Concubine's Stunning Daughter : Ghost Emperor Please Be Lenient! - Chapter 15-16

In a world where human and monsters relied on mystical fruits and their inner power to fight for dominance, a lost soul was thrown, given the powers from all the other worlds he’s known. But there was a catch; he had no control over what power he would get! With knowledge beyond that of most, he sails his path to the top of the one piece world!

- Description from Novelupdates

Standing last among those sailors, Byron was shoved roughly onto that narrow gangplank by the pirates.Just a short distance beneath his feet churned blood-steeped waves and dozens of gaping mouths filled with sharp teeth!“Thud.”He could only watch helplessly as the sharks opened their mouths, stirring up turbulent currents in the ocean as they bit viciously towards him!However, the [Sailing Logbook] formed before his eyes and wrote furiously on its own:“The ancient blood of the Bayfolk within you begins to boil.Spiritual sublimation commences!”

Beings that create and control monsters and demons, beings that build and reign over malicious labyrinths, the chosen individuals to possess an overwhelming Unique Skill… They are the Demon Lords.

The romantic comedy light novel series centers on the gaming lives of various high school students who play video games, including: Keita Amano, a lonely young man who loves video games; Karen Tendō, the beautiful president of the video game club; Chiaki Hoshinomori, who constantly fights with Keita; and Tasuku Uehara, who puts on a facade of being satisfied with his life in the real world, but he in truth loves video games.