Una pareja de cucos, 1

The lives of Erika Amano, a high school student from a well-to-do family, and Nagi Umino, the son of a family restaurant owner, intertwine after discovering they were mistakenly swapped as babies. To top it off, they now have two mothers and two fathers, who love their biological child as much as the one they have raised, and they arrange everything so that Nagi and Erika end up engaged and living together! The routine of this pair of cuckoos is at the mercy of the whims of fate...