Usotsuki Paradox (Japanese: うそつきパラドクス, Hepburn: Usotsuki Paradokusu), also known by the short title Usopara (うそパラ),[2] is a Japanese manga series written by Nanki Satō and illustrated by Akira Kiduki.

[2] Hakusensha collected its chapters in nine tankōbon volumes, released under the Jet Comics imprint, between September 29, 2009, and June 26, 2012.

A 10th volume with extra chapters, subtitled Jikangaiteate (時間外手当) was published simultaneously with the 9th.

[2][4] A live-action film adaptation, directed by Kōta Yoshida, premiered at the Human Trust Cinema in Shibuya on September 7, 2013.

The lead characters Shunsuke Yōkadō and Hinako Seiyū are portrayed by Nami Motoyama and Akihiro Mayama respectively.