When classmates Mayuri Asana and Youji Aikawa catch their lovers kissing each other, they form a secret pact: to get back at them, Mayuri suggests that she and Aikawa have a love affair of their own. But these sorts of clandestine dealings are never simple, and what started out as a business-like conspiracy soon sparks something between them. Initially a romance born from revenge, they must now deal with the troubles and secrecy that come with being partners in crime and love. [Written by MAL Rewrite] Note: this entry is for the two-volume release and not the webcomic serialized on the E★Everystar platform.

Nisekoi Doumei. is based on Aoi Sakaki's novel of the same title, which was published on March 30, 2011. The manga adaptation began online serialization on the E★Everystar platform in 2012 and physical release began the following year. The physical release ended at 2 volumes and featured an original ending, while the webcomic continued serialization for 112 chapters. The webcomic was republished on in Japanese, and as "Nisekoi" in Chinese and English from December 10, 2014 to January 26, 2017.