Lysandra Blackthorn is everything her family expects her to be - pure-blooded, poised, and patient. The only thing she hasn't given them yet is the Dark Mark, and time is running out. Her twin brother Lazarus already bears it. So does every person she's ever known. The Blackthorn name doesn't produce hesitation - it produces soldiers. Then Lazarus nearly dies on a Death Eater mission, and the person who pulls him out isn't family. It's Mattheo Riddle. Voldemort's son. Her brother's closest friend. The most dangerous boy in Hogwarts and the one person Lysandra has successfully avoided making an enemy of - until she tries to thank him, and he makes it very clear he'd rather she didn't. What follows is a war conducted entirely in cold looks and sharp words across corridors, classrooms, and every shared space Theodore Nott gleefully engineers between them. Mattheo is cruel the way only someone hiding something can be. Lysandra is patient the way only someone raised among wolves learns to be. But sixth year bleeds into seventh, the real war bleeds into the walls of Hogwarts itself, and somewhere between the debt she never asked to carry and the boy who keeps pretending she doesn't matter - something shifts. The problem isn't falling for him. The problem is that loving Mattheo Riddle and becoming her family's obedient soldier are two things that cannot exist in the same person at the same time. And she's running out of room to be both.

At Hogwarts, Freya Malfoy had always been apart of a game she can never win. She can ignore the rumors and the whispers about her and let people believe what they want, or she can defend herself and give people another reason to talk. Each choice leaves her exactly where she started- judged for a last name she never chose. She's learned to keep her circle small- including Draco, her twin, her best friend, and the person who's been beside her through all of it. When they were seven, they made a promise to keep it that way 𝙣𝙚𝙫𝙚𝙧 𝙛𝙖𝙡𝙡 𝙛𝙤𝙧 𝙚𝙖𝙘𝙝𝙤𝙩𝙝𝙚𝙧𝙨 𝙛𝙧𝙞𝙚𝙣𝙙𝙨. It seemed like the easiest promise in the world to keep. And oh, were they so wrong.

During her sixth year at Hogwarts, Sienna Lockwood finally takes part in the Soulmate Ceremony, an ancient tradition that reveals soulmates through matching colors in their hair. She never believed the spell was infallible until it matches her with Mattheo Riddle, her longtime rival. Now bound by a connection neither of them wants, Sienna must figure out whether fate has made a terrible mistake or the perfect choice.

Slytherin boys react and preferences including Draco, Blaise, Mattheo, Theo and Tom

Sixth year was supposed to be about power - not him. You're a Slytherin with ties to the Dark Lord and a future already written in shadow. But when Mattheo Riddle - your ex and the Dark Lord's son - returns to Hogwarts and becomes your partner for missions, old betrayals resurface and unfinished feelings refuse to stay buried. In a world where loyalty is everything, love might be the most dangerous game of all.