Stranger's Handbook - Chapter 21: As Her Fiancé (First Part)

Kurokami Haruto, a 16-year-old high school student, lives an ordinary life with his older sister Kurokami Satsuki—a beautiful, gentle nurse who’s… a little too devoted to her little brother.Haruto always dismissed rumors about “Awakened Ones”—people who suddenly gained supernatural powers—as nothing more than internet nonsense. Until one day, after fighting with scoundrels to defend a strange girl, he woke up to a system interface flashing before his eyes:> 《 SYSTEM: “Chosen of the Abyss” Activated 》> • Main Skill: [Moonlight Blade Manifestation] - Summon up to three spectral swords.> • Main skill: [Abyssal Devour] – Absorbs energy from the moon, converting it into personal strengths.> • Hidden Skill (Rare): [Yandere EXP Farm] – Whenever a yandere develops feelings for him, all main skills gain double experience.> • System Service: “Scanning for yanderes within 10 miles… Detected: 1 target:Kurokami Satsuki.”Haruto: “…What is this?! My onee-chan?!”

Levi Jackson is a brilliant criminal psychologist with a knack for reading people. He uses his twisted genius in making a name for his private detective agency ‘Jackson Detectives’ with the business motto of “No case is too insignificant, as long as you're willing to pay.”Presented with the case of a missing accountant, he is forced to seek the help of Guy’s Hospital resident genius, and Director of Forensics, Dr. Sam Gray.Join them in their adventure in solving different crimes and pissing people off along the way.

Xie Tao had always believed in science until one day, a meteorite smashed into his yard, forcing him to bind to a heroic world saving script. The worst thing was that the script didn’t even follow common sense.

Others become superheros while he became a super-nanny. So in his left hand was a “Cub Encyclopedia” and in the right, a small milk bottle to feed the small cub clinging onto his leg.

Today, Xie Tao is trying his best to save the world.

- Description from Novelupdates

Insane. Traitor. Terrorist.