Thirteen

Mondo Fujieda harbors deep romantic feelings for a girl named Izayo Gorugo, but his affection is complicated by a dangerous reality: her entire family belongs to a lineage of professional assassins. Despite the perilous nature of her background, Mondo’s emotions lead him into a fateful misstep. He ends up publicly humiliating Izayo, an act that shatters any possibility of a normal relationship between them. Driven by wounded pride and the lethal traditions of her upbringing, she swears a solemn vow to take his life as retribution. Fortune briefly intervenes on Mondo's behalf when Izayo unexpectedly moves away, granting him a temporary reprieve from her deadly promise. For years, he lives with the lingering anxiety of her threat, hoping that time and distance have erased her desire for revenge. However, those hopes are shattered when Izayo finally returns, fully prepared to fulfill the vow she made long ago. Now, Mondo finds himself trapped in a desperate situation, forced to confront a chilling question: how can an ordinary young man possibly survive against a highly trained assassin determined to claim his life?