Nagi Umino and Erika Amano, a studious high schooler and a social media influencer, shared no common ground—until they discovered they had been swapped at birth. Upon learning this shocking truth, both families quickly concocted a scheme without Nagi or Erika’s knowledge: to return each to their biological parents and guarantee everyone’s happiness, the pair must become engaged. Nagi and Erika immediately reject this ridiculous proposal, refusing to comply with their parents’ demands. However, since neither side is willing to yield, only time will reveal how their relationship unfolds.