Ghost

Fairies and dark creatures ambush students returning to school, and Salazar Slytherin protects them as they fight their way out.

When they return to the castle, an unexpected turn of events occurs.

Walking through the dark corridor, Salazar pushes open a door and finds four long tables packed with people, floating pumpkins, a feast, and a completely unfamiliar white-bearded headmaster and professors.

Salazar, covered in blood: ???

Where’s the school?

He turns around, only to find that there’s just one student left, and they’ve turned into a milky-white ghost???

The little creatures startled once again on Halloween: ???

The headmaster and professors, suddenly confronted with a Founder: ???

CP: GS

PS: This story’s setting differs from the author’s previous series. This is the original Salazar, not someone who transmigrated or was reborn.

It’s the incredibly old-fashioned “the protagonist opens a door and transmigrates” trope.

Protagonist: I suspect there’s something wrong with this door.

Theme: Voldemort fans, please stay away.