This is the story of Harry's son, Albus Severus Potter.
The magical explosion in 2006 was more than just a disaster. The seeds of the apocalypse had already been planted, and this time, even Harry Potter was powerless to stop it.
The story features mermaids, elves, vampires, the Triwizard Tournament, and the final Time-Turner, among other things.
The male lead shares a unique bond with Draco Malfoy's son, and can also win over the villainous Dark Lord.
This work is also known as The Savior Becomes a Mary Sue and Saves the Wizarding World, or The Complicated Relationship Between the Protagonist and the Yandere Villain, or Albus and Scorpius's Shameless Days Together.
[Story Details] Albus and Scorpius pairing, Albus is in Gryffindor, original main plot, epic storyline, original-work style, lots of original worldbuilding, long-form serious story, happy ending
Theme: Albus and Scorpius love and fight each other, then join forces as equals
It's great, can't wait for the next chapter!