The Law of Webnovels - Chapter 404

In a world where magic intertwines with reality, a dying human girl named Elara awakens to find herself in a foreign land. The air smells of ancient forests, and the sky is painted with hues she’s never seen before. Before her stands the enigmatic Demon Queen, Seraphina, her eyes as cold as the ice that encases her throne.Seraphina proposes a desperate bargain: a contractual marriage between them. In exchange for Elara’s hand, Seraphina promises to save the crumbling human kingdom from impending doom. Elara, with nothing left to lose, accepts, thrust into a web of intrigue, danger, and forbidden emotions.As they embark on their perilous adventure, Elara discovers that Seraphina’s icy demeanor hides a tragic past. The Demon Queen’s power is unmatched, her wrath swift and merciless. Yet, beneath the frost, Elara glimpses vulnerability—a longing for connection that defies her ruthless reputation.

A teenager named Evan Mason was reincarnated into the magical world of Harry Potter and goes to school at Hogwarts!
With only his knowledge of the future and great talent for magic, he takes the path towards the top of the magic world, only to realize that ever step he took, changed everything!

- Description from Novelupdates

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?!”