Kakkou no Iinazuke

天野エリカ

Erika Amano (天あま野の エリカ, Amano Erika) is the main female protagonist of the A Couple of Cuckoos manga series. She is a popular Instagram celebrity who is the biological daughter of the family that raised Nagi. She first meets him while taking videos at a park, and makes him pretend to be her boyfriend to escape from an arranged marriage. Her parents arrange for her to be engaged to Nagi and for them to live together in a single house. After her school discovers the pictures she took with him, she is forced to transfer to Nagi's school.

Bio from Fandom, licensed CC BY-SA

海野凪

Nagi Umino (海うみ野の 凪なぎ, Umino Nagi) is the main male protagonist of A Couple of Cuckoos Manga Series. He is a second-year student at Megurogawa Academy, who is ranked second in his grade. He is the biological son of a hotel tycoon, but due to a mix-up after his birth is raised by a different family.

Bio from Fandom, licensed CC BY-SA

海野幸

Sachi Umino (海うみ野の 幸さち, Umino Sachi) is the adopted younger sister of Nagi Umino and the biological younger sister of Erika Amano. When Sachi learns that Nagi has to leave their family home to live with Erika, she runs away from home and stays with Nagi and Erika.

Bio from Fandom, licensed CC BY-SA