Nanami was happily married to her older boyfriend, enjoying a blissful newlywed life. However, as time passed, she began to notice a change in her husband's behavior. He developed an abnormal obsession with certain parts of her body, once rubbing his erect penis against her hair for satisfaction. His actions gradually escalated, leaving Nanami increasingly uneasy. One day, while serving him with a blindfold on, she heard a strange voice in her ears. When she removed the blindfold and looked up, the man before her was an unfamiliar stranger. In that instant, Nanami began questioning what was happening to her and what her husband's true intentions really were.