It’s hate at first sight... Rather, a knee-to-the-head at first sight when Raku Ichijo meets Chitoge Kirisaki! Unfortunately, Raku’s gangster father arranges a false love match with their rival’s daughter—who just so happens to be Chitoge! However, Raku’s searching for his childhood sweetheart from ten years ago, with a pendant around his neck as a memento, but he can't even remember her name or face!
When Chitoge transfers into Raku's class, they're forced into a false love relationship to keep the peace between their feuding gangster families. Everyone at school's fooled by their act—even Raku's crush, Onodera! Raku wants Onodera to know the truth, but he just can't seem to find a way to tell her. Meanwhile, the ever-vigilant CLAUDE sends his protégé Tsugumi to watch over Raku and rescue Chitoge from his evil intentions. What chance does Raku stand against a highly trained assassin?!