After defeating Voldemort, Harry helps Hermione find her parents in Australia. There were consequences to sending them away, and without jobs or a house, the Grangers are living with him. Harry/Hermione's Mum pairing.
During the summer before his fourth year, Harry starts to remember Tom's memories. A life of murder and magic most foul fills his head, revealing a terrible truth: the Killing Curse left a piece of Voldemort's soul inside him. The Tri-Wizard Tournament isn't ready for a Harry with the abilities of Tom Riddle. (Harry X Multi, Lemons)
Harry causes a diversion in Potions class using sticking solution so Hermione can steal ingredients from Snape's office. He spills some on his hand, and when Hermione grabs it, their hands get stuck together. (Reimagining of my "Magical Mishap" story, where there is a lot more buildup, including cohabitation, bed-sharing, showering, accidental touching, etc.)
A strange accident as two Boy's-Who-Lived swapping places. Harry James Potter suddenly finds himself in a world where he has a mum and a sister, and magic? While James Harry Potter suddenly finds himself in the most ass-backward world possible. Both his parents are dead, he lives with his abusive aunt and uncle, and Hogwarts is a university?
Trope has been done to death, but here is another Ministry Breeding Program fic with Harry/Narcissa as the pairing. Narcissa has been in jail since the end of the war. While serving her sentence, she is given the opportunity to sign up for the Wizarding Re-Population Act and trade her cell for a wizard's bed.
After sacrificing himself to save the wizarding world, Harry learns the title "Master of Death" isn't just philosophical. He finds himself reborn as Harry the Heir. Then the king dies, Harry's new life goes to shit, and he suddenly finds himself wearing a crown and fighting in a war far worse than the 2nd Wizarding War
Collection where Canon-Scenes become Smutty. Hermione, Ginny, Romilda, Lavender, Fleur, Narcissa, and many more! All your favorite witches! LEMON / SMUT / HAREM (Check character tag for most recent witch pairing chapter)
Now in college after No Way Home, Peter comes home after a party to May who survived the Green Goblin's attack. She is the only one who remember who Peter Parker is! MCU HOT AUNT MAY LEMON/SMUT
The Summer after the Battle of Hogwarts, with Harry and Hermione both living at 12 Grimmauld Place a complete accident puts the two friends in an unlikely position! SMUT / LEMON, PLOT?/WHAT'S THAT?