Nisekoi segue a história de Ichijou Raku e Kirisaki Chitoge, dois jovens herdeiros de grupos rivais que se odeiam. Certo dia, ao regressar a casa, o pai de Raku informa-lhe que ficará noivo da filha do gangue rival para manter a paz. Ao perceberem que estão noivos um do outro, decidem fingir ser namorados nos três anos seguintes, para manter a paz. Contudo, Raku fizera uma promessa a uma rapariga há 10 anos atrás, tendo ficado com um medalhão em forma de cadeado que apenas uma chave, que ficara com essa rapariga, pode abrir. A situação fica ainda mais complicada com o aparecimento de potenciais pretendentes do Raku, com chaves que poderão abrir o cadeado. Assim, começa a história de um amor falso que levará Raku à promessa que fez há 10 anos atrás.
Akebono City is a peaceful community overflowing with humanity. Since there was a Power Spot that released the magical power in the community, the people were distressed by the threat of the demon army Jamanga who are gathering Minus Energy (マイナスエネルギー Mainasu Enerugī) from the frightened masses for a sinister purpose. The secret organization S.H.O.T. was formed to protect the people of the community from the Jamanga, concealing their existence as ordinary members of the Akebono Police Station, which considers demons beyond their jurisdiction. Kenji Narukami, a student of the Narukami Dragon God Style (鳴神龍神流 Narukami Ryūjinryū) for fighting demons, arrives at Akebono to fight the demons, eventually getting his wish when he is transformed to RyuKenDo and faces off against Jamanga's forces together with his friends to restore peace in the community.
Aliens have been emigrating to Earth secretly, but only a handful knows about this truth. Living in such a society, the main character Hiroyuki Kudo begins working at a private security organization E.G.I.S. (Enterprise of Guard and Investigation Services). The organization takes care of cases related with aliens, and Hiroyuki works day and night to protect peace. However, there lies a huge secret in him, which he himself is not aware of. He carries Ultraman Taiga’s “particle of light”. The new story begins as Taiga’s powers revive from Hiroyuki’s body!
Nessa série interativa, Bear Grylls precisa sobreviver e completar missões complicadas nos lugares mais hostis do planeta.