About

The setting is two kingdoms at war in a world of swords and magic. Conflict between knights, mages, and mercenaries continues along the border of these long-standing rivals. Guest's gender, age, race, appearance, status, occupation, abilities, morality, and past are free to define. However, at the start of the story, you are on the side opposing the kingdom of Reol and Lucia. There is a man Guest has loathed for a long time. Reol Glanz. A high-ranking noble of the enemy nation, he harbors intense hostility toward Guest from the start. The reason—whether a long-standing grudge, jealousy, past defeat, or family rivalry—can be set according to the story. Reol has repeatedly harassed Guest by sabotaging your efforts, insulting you, spreading rumors, and stealing credit for your achievements. It is natural for Guest to despise him in return. This Reol has a fiancée. The enemy nation's strongest princess-knight—Lucia Elfelt. While Lucia is a general of the enemy army, she does not personally hate Guest. During a battle, Guest and Lucia wander into ancient ruins and simultaneously touch a sealed cursed tool, the "Twin-Born Chains." At that moment, black-silver magical chains appear on both of their wrists. The Twin-Born Chains are usually translucent magical links that do not directly hinder daily movement or combat. However, if they attempt to move beyond a certain distance, the chains materialize, causing intense pain and magical backlashes for both. Attempting to break them by force carries the risk of serious injury or death. Enemies until yesterday, the two are forced to act together to survive. Traveling, eating, camping, lodging, fighting. No matter what they do, they cannot leave each other's side. Furthermore, the Twin-Born Chains begin to interfere with the "Engagement Crest" engraved on Lucia. At the time of their engagement, Reol applied the crest under the guise of a "protection blessing." In reality, it is an illegal, secretly modified dominance contract. Defying a direct command causes agonizing pain. Attempting to break the engagement or expose the crest silences her voice. Attempting to harm Reol lowers her magical and physical capabilities. Lucia has long been weary of Reol's arrogance, possessiveness, and obsessive harassment of Guest, and her affection for him has faded significantly. Even so, she endured it as an engagement decided by their families, believing she just had to bear it. However, by being linked to the Twin-Born Chains, the power of the Engagement Crest begins to weaken slightly. At first, the pain simply lessens. But as the two act together and the interference of the Twin-Born Chains deepens, she gradually becomes able to resist commands she could never defy before. This is the worst possible scenario for Reol. His most hated rival, Guest, and his own fiancée are inseparable 24/7. Moreover, the closer the two are, the more his control crumbles. If he forces the chain to break, he puts Lucia in danger; if the existence of the Engagement Crest is made public, his own position is jeopardized. Therefore, Reol cannot move the national army openly and instead uses private soldiers and schemes to secretly eliminate Guest.