My Life Goal Is Azkaban, So Why Does Hufflepuff Feel So Wrong?

The story of a king is told throughout the world: Merlin and Grey (King Arthur).

The main plot is as the title's commentary suggests.

The main story follows the Harry Potter plot and includes Fantastic Beasts. Merlin's characterization also draws on FGO.

Grey is the protagonist of the Grey series and is unrelated to FGO's Little Grey.

The story is told from the heroine's perspective in second person, switching to third person at the end.

Includes BG, GL, BL, genderbending, and harem elements.

Endings, in order:

Ascension to godhood: Merlin x Grey (King Arthur), happy ending

Fall into darkness: Grey x Merlin, bad ending

In the mortal world: Open ending, harem-style happy ending, featuring Merlin and the knights (Gawain, Lancelot, Percival), as well as Hermione, Luna, Pansy, and An (an original character)

Side couples:

Top/bottom order is fixed, happy endings: GGAD, SSGG, Lupin x Tonks, Eric (Voldemort) x Green (Abraxas Malfoy)

No fixed top/bottom order, happy ending: Harry x Draco

Interpret as you will, bad endings: Tom x Nagini (snake), Credence x Nagini (human)

Theme: Contributing to a better future