Fics like Lunacy

Teddy was born a werewolf. James gets bitten later in life (not by Teddy) and Teddy is there to help him through his first heat. Excerpt: Fortunately, five years of dealing with monthly involuntary transformations into an essentially wild animal had equipped James with a profound sense of pragmatism and matter-of-factness in the face of most things that life could throw at him. Unfortunately, his current condition was completely outside of that realm. Between the headache, the nausea, the throbbing scar and the burgeoning erection—well, he was starting to feel a bit panicky. And completely useless.

You may also like

tie up the boat, take off your coat by valryon (Harry Potter - J. K. Rowling)
Leap Forward by MistyTheGhost (Harry Potter - J. K. Rowling)
Death Grip by heyitsamorette (Harry Potter - J. K. Rowling)
At The End of The Rope by shiftylinguini (Harry Potter - J. K. Rowling)
Celestial Bodies by shiftylinguini (Harry Potter - J. K. Rowling)
Dating Potters by GoldenTruth813, Mzuul (Harry Potter - J. K. Rowling)
Strangers in a Dark Room by shiftylinguini (Harry Potter - J. K. Rowling)
Up The by shiftylinguini (Harry Potter - J. K. Rowling)
How Love Hurts by AlindaKB (Harry Potter - J. K. Rowling)
Oh Mother! by rubykrishna (Harry Potter - J. K. Rowling)
Omega by iamisaac (Harry Potter - J. K. Rowling)
Scorpius Malfoy's Future Wife by orphan_account (Harry Potter - J. K. Rowling)
Head Over Heels by birdsofshore, shiftylinguini (Harry Potter - J. K. Rowling)
Heart and Soul by shiftylinguini (Harry Potter - J. K. Rowling)
The Godric's Hollow Wizarding Parents Association by AhaMarimbas (Harry Potter - J. K. Rowling)
What I'm Waiting to Find by gracerene (Harry Potter - J. K. Rowling)
The Road To Here by toxikgato (Harry Potter - J. K. Rowling)
Sunseeker by shiftylinguini (Harry Potter - J. K. Rowling)
The War Isn't Over When the Soldiers Come Home by keepcalmsmile (Harry Potter - J. K. Rowling)
Whisper Me This by Adora_Slytherin (Harry Potter - J. K. Rowling)