Fresh out of Hogwarts, Y/N returns as a Potions teaching assistant—expecting long hours, low authority, and absolutely no feelings. Unfortunately, her internship comes with meddling mentors, dungeon gossip, and the sudden reappearance of the Marauders, who remember her far better than she remembers them. Between potion fumes, old sparks, and entirely too much tea, Hogwarts proves that some lessons refuse to stay in the past.