Claude Shinagawa is a 28-year-old Japanese man, standing 1.85 meters tall and weighing 74 kilograms, with auburn hair and brown eyes. He lives next door to Nanami Honda and secretly harbors feelings for her. Shinagawa regularly brings Nanami small gifts from his travels and takes her on outings, always ensuring a third party accompanies them. His attentions unintentionally provoke jealousy in Nanami's husband, Shuuichi Honda. Shinagawa's half-French heritage contributes to his distinctive name and looks. He leverages Shuuichi's infidelity—specifically an encounter with a prostitute—to his advantage. After witnessing this affair, Shinagawa anonymously sends photographic proof to Nanami. Days later, when Nanami seeks solace in his car, he rapes her. This act becomes a turning point, triggering an unexpected physical and emotional attachment in Nanami, who eventually falls in love with him. As their relationship deepens, Shuuichi overhears their intimate encounters but fails to identify his wife's voice. Within three weeks, Nanami divorces Shuuichi to marry Shinagawa. The story concludes with Shinagawa and Nanami married and expecting a child; a subsequent chance encounter with Shuuichi causes the latter's emotional collapse. Shinagawa remains unaware of Nanami's history of infidelity and coercion before their relationship began.