A man named Hayama sends a letter addressed to Hikari Chou. The letter states that his friend, Kawamoto (pseudonym), is enjoying an affair with his mistress, and during their encounters, he always makes her swallow his cum. Hayama requests that someone film the couple's intimate moments. Acting quickly, contact is made with Kawamoto through Hayama to begin the interview. Kawamoto easily admits to his affair with his mistress, "Kana." When asked to record their sexual encounters, Kawamoto initially hesitates but gradually reveals his own cuckold fetish and his partner—the married woman's—desire to swallow semen.