16-year-old super-studier Nagi Umino, second-year student at the Megurogawa Academy high school, was switched at birth. On his way to a dinner to meet his birth parents, he accidentally meets the brash, outspoken, Erika Amano, who is determined to make Nagi her fake boyfriend as she never wants to actually marry. But once Nagi makes it to dinner, he finds his parents have decided to resolve the hospital switch by conveniently having him marry the daughter his birth parents raised…who turns out to be none other than Erika herself!

In the climax of the Okinawa arc, Erika and Hiro clash over their feelings for Nagi?! Meanwhile in Tokyo, while waiting for the others to return, Sachi has an unexpected visitor...from someone who had disappeared?! In the midst of all that, Nagi's mom Namie collapses... As he's on his way back to Umino-tei, Sachi hits him with the shocking assertion that he's "no longer her family"...

16-year-old super-studier Nagi Umino, second-year student at the Megurogawa Academy high school, was switched at birth. On his way to a dinner to meet his birth parents, he accidentally meets the brash, outspoken, Erika Amano, who is determined to make Nagi her fake boyfriend as she never wants to actually marry. But once Nagi makes it to dinner, he finds his parents have decided to resolve the hospital switch by conveniently having him marry the daughter his birth parents raised…who turns out to be none other than Erika herself!

In the climax of the Okinawa arc, Erika and Hiro clash over their feelings for Nagi?! Meanwhile in Tokyo, while waiting for the others to return, Sachi has an unexpected visitor...from someone who had disappeared?! In the midst of all that, Nagi's mom Namie collapses... As he's on his way back to Umino-tei, Sachi hits him with the shocking assertion that he's "no longer her family"...