It was originally published as a one-shot in September 2019, before beginning serialization in Kodansha's Weekly Shōnen Magazine in January 2020.

Nagi Umino is a 17-year-old second-year high school student who learns that he is not the biological child of the family that raised him.

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.

[69] A spin-off mini anime series titled Kakkō no Iikagen premiered on YouTube on April 28, 2022.

[72] 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.

[76] The series ranked fifth on the "Nationwide Bookstore Employees' Recommended Comics of 2021" by the Honya Club website.