The Hero King, Reincarnate to Master the Art of War ~And Thus, I Became The Strongest Knight Disciple (♀) in The World~ - Chapter 476https://re-library.com/translations/hero-king/Book 12: - 16-year-old Inglis and the Search for a Dragon God (3)

Ryu Han-bin, the main character who fell into a new world after being chosen as a ‘suitable person’.

Because of the error in the guidelines, the training is repeated endlessly…

After crossing over, I came to the world of Suqing. “Blessings for a Wonderful World”? Good guy, stop talking, let me steal more abilities from Akuya first! World travel, analysis and imitation? Hahaha, I am invincible! This book is comprehensive, including but not limited to “Su Qing”, “Ghost Slayer”, “Encounter in the Dungeon”, “From Zero”, “Overlord” and so on.

Keywords: relaxed, funny, complaining, semi-invincible

- Description from novelbuddy

Our protagonist Caam is a man from Earth that was reincarnated into this world as a demon. In order to survive, he spared no effort in avoiding the sparks of battle and without noticing it, he became strong himself.

The Special Investigations Unit is a covert organisation that no-one in the city knows about, dedicated to investigating bizarre occurrences beyond the comprehension of the living. The Chief Zhao Yunlan isn’t a simple guy either, being the inheritor of the Guardian Order, he has always been a righteous conformist, excelling between realms of the living and the dead. While investigating a school suicide case, Zhao is attracted to the calm and reserved Professor Shen Wei, but the Professor seems to be rather fickle towards him…

- Description from Novelupdates