A Couple of Cuckoos

High school student Nagi Umino has always known he was switched at birth, and the day finally arrives for him to meet his biological parents. However, a chance encounter on that very day changes everything when he crosses paths with Erika Amano, a student from an elite and affluent girls' academy. At her insistence, Nagi is practically coerced into posing as her boyfriend to help her escape an arranged marriage to her fiancé. What neither of them anticipates is the astonishing revelation that they are the two infants who were accidentally swapped, and their respective families have already decided they should marry each other to resolve the situation. With both sets of loving parents enthusiastically endorsing the arrangement, Nagi and Erika are thrust into cohabitation. The living situation is far from romantic, as Nagi harbors genuine feelings for his classmate Hiro Segawa, while Erika remains fiercely determined to defy her father's controlling plans. To protect their individual goals, the reluctant couple establishes a firm agreement to keep their relationship strictly platonic and avoid any real emotional entanglement. Bound by circumstance rather than choice, their chaotic and unpredictable new life together sets the stage for a delightfully tangled romantic comedy.