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Guilty As Sin? | Harry James Potter x OC

Summary:

𝐈𝐟 𝐢𝐭'𝐬 𝐦𝐚𝐤𝐞 𝐛𝐞𝐥𝐢𝐞𝐯𝐞
𝐖𝐡𝐲 𝐝𝐨𝐞𝐬 𝐢𝐭 𝐟𝐞𝐞𝐥 𝐥𝐢𝐤𝐞 𝐚 𝐯𝐨𝐰
𝐖𝐞'𝐥𝐥 𝐛𝐨𝐭𝐡 𝐮𝐩𝐡𝐨𝐥𝐝 𝐬𝐨𝐦𝐞𝐡𝐨𝐰?

During the rise of Lord Voldemort, Harry Potter is drawn into a dangerous game when he gets close to Luara Malfoy, a quiet and observant Ravenclaw with secrets of her own. Both are tasked by opposing sides to use each other for information, entering a relationship built entirely on lies and careful manipulation.

But as the war intensifies, their act begins to blur into something real. Jealousy, trust, and unspoken loyalty complicate their missions, until the truth of their deception leaves them both shattered. Even after choosing opposite sides, they continue to protect one another in silence.

When the war finally ends, they are left to face what remains-no longer as enemies or spies, but as two people forced to confront a love that began as a lie.

harry potter x oc
hbp-after war

april 14, 2026-
© kathwieee, 2026

Notes:

WARNING:

This book is loosely based on the books, and I do not own them. Guilty as Sin follows the timeline of Half-Blood Prince and the Deathly Hallows, but you see them more in Luara's POV. This skips a lot. Sometimes, the dialogue changes as I fix it to fit the scenes.

Please do not read if any of these things bothers you, as this story contains angst, wars, violence, depression, etc.

 

⚝ KATHY SPEAKS !

This is really funny. I found a TikTok where it was a POV of Harry x Y/N, where Y/N works for Voldy and dates Harry to get information. And Harry is doing the same thing. So yeah, here we are.

As a woman who is now free from a toxic relationship [aka, newly single] (haha), I am back on obsessing with fictional characters. It just so happens that Harry Potter is now the main target.

I hope you enjoy this book as much as I did writing them. Once again, English is not my first language. So pardon me if I misspell anything or misuse a word-do feel free to correct me in the comments, and I'll change them immediately. Thank you for choosing this book once again! Love lots ♡

Chapter 1: Introduction

Chapter Text

Where loyalty is measured in silence and survival depends on secrets, Harry Potter is asked to do the one thing he's never been good at—pretend.

When suspicion falls not just on Draco Malfoy but on the quieter, more elusive members of his family, Harry turns his attention to Luara Malfoy—a Ravenclaw who watches more than she speaks, and knows more than she should. Getting close to her is supposed to be a strategy. A means to an end.

But Luara has her own mission.

Tasked with uncovering Harry's secrets, she chooses a method far more dangerous than force: she makes him trust her. What begins as a calculated arrangement—two enemies circling each other under the guise of something tender—quickly unravels into something neither of them can fully control.

Because the longer they pretend, the harder it becomes to remember where the lie ends.

Jealousy creeps in where it shouldn't. Truth slips through where it was never meant to. And in a world where every word could be a weapon, the quiet moments between them begin to feel dangerously real.

By the time the war reaches its breaking point, they have already broken each other.

And yet—even as sides are drawn and choices become irreversible—they continue to protect one another in silence, in shadows, in ways no one else sees.

Because some loyalties aren't chosen in the light.

They are forged in the lies you tell... and the truths you can't take back.

But when the war ends and the pretending is no longer necessary, what remains between them?

Was it ever real to begin with—or were they just two enemies who got lost in a lie they wanted to believe?