is a Japanese manga series written and illustrated by Miki Yoshikawa. It was originally published as a one-shot in September 2019, before beginning serialization in Kodansha's Weekly Shà Ânen Magazine in January 2020. An anime television series adaptation produced by Shin-Ei Animation and SynergySP aired from April to October 2022. A second season produced by Okuruto Noboru aired from July to September 2025.
Nagi Umino is a 16-year-old second-year high school student who learns that he is not the biological child of the family that raised him. On the way to his first meeting with his biological family, he meets Erika Amano, a popular internet celebrity who is trying to escape from an arranged marriage. Later, Nagi and Erika discover that the hospital had accidentally switched the two after their births and their parents are now aiming to put them in an arranged marriage; so they, selfishly, do not have to say goodbye to the children they raised after missing out of their respective childhoods. To facilitate this, they are made to live in a house owned by Erika's family; hoping the two will fall in love before graduation, but will respect their wishes to abandon the idea if nothing comes of it.
A Couple of Cuckoos is the first manga series in which Miki Yoshikawa uses digital drawing.
Miki Yoshikawa first published the series as a one-shot in Weekly Shà Ânen Magazine in September 2019, as part of a promotion in which she would publish three one-shots and readers could vote on which would receive a serialization. The series began serialization in Weekly Shà Ânen Magazine on January 29, 2020. The first volume was released on May 15, 2020. A promotional video for the series was released on June 11, 2020. The video was voiced by Yuma Uchida and Maaya Uchida, who are siblings. The series entered its final arc on January 28, 2026. As of January 2026, thirty-one volumes have been released.
The series is licensed in digital format in North America by Kodansha USA.
In April 2021, an anime television series adaptation was announced. It is animated by Shin-Ei Animation and SynergySP and directed by Yoshiyuki Shirahata, with Hiroaki Akagi serving as chief director, Yasuhiro Nakanishi overseeing series scripts, and Aya Takano designing characters. The series aired from April 24 to October 2, 2022, on TV Asahi's NUMAnimation block. It aired for two consecutive cours. The first opening theme song is by Kiyoe Yoshioka, vocalist of the Japanese duo Ikimonogakari, while the ending theme song is by Sangatsu no Phantasia. The second opening theme is "Glitter" by Sumika, while the second ending theme is "Hello Hello Hello" by Eir Aoi. Crunchyroll licensed the series for worldwide streaming outside of Asia. A spin-off mini anime series titled Kakkà  no Iikagen premiered on YouTube on April 28, 2022.
On April 11, 2022, Crunchyroll announced that the series would receive an English dub, which premiered on May 7. On July 10, 2022, a promotional video for the second cours starting on July 23 was released. Eir Aoi performed the new ending theme song "Hello Hello Hello".
A second season was announced in July 2024. It is produced by Okuruto Noboru and written and directed by Masakazu Hishida, with Kyoko Chika designing the characters, and Rei Ishizuka returning as the composer. The season aired from July 8 to September 23, 2025, on Tokyo MX and other channels. The opening theme song is performed by Asmi, while the ending theme song is by 22/7.
It was reported that the first volume of the manga sold out in stores due to high demand, and that sales exceeded the publisher and author's expectations. A Couple of Cuckoos ranked twelfth on Takarajimasha's Kono Manga ga Sugoi! list of best manga of 2021 for male readers. The series ranked fifth on the "Nationwide Bookstore Employees' Recommended Comics of 2021" by the Honya Club website. The manga was nominated for the 46th Kodansha Manga Award in the category in 2022.