A Couple of Cuckoos Season2

Nagi Umino and Erika Amano were born on the same day, but as babies, they were accidentally switched at birth.
Nagi grew up as the son of a small diner owner, while Erika was raised as the daughter of a hotel magnate.
When the truth is revealed, both their biological and adoptive parents suggest a solution: the two should become fiancés.
As Nagi and Erika begin living together under one roof, their unusual arrangement starts pulling others into the chaos, including Nagi's classmate Hiro Segawa and Nagi's younger sister Sachi Umino, who follows him to their new home.
A fiancée, a crush, and a sister with no blood relation. What began as a tangled love quadrangle around Nagi becomes even more complicated when his childhood friend, who is in love with him, suddenly appears.
Lives and love collide in unexpected ways. A five-sided romantic comedy born from a switched at birth twist. This summer, fate begins to move even more dramatically.