The story takes place in the near future after a global war. A radical lie detector device "Guide" was invented to enlighten and change humans who are good at deceiving and hurting each other. The inventor selected a couple as the first test subjects. In the isolated suburbs, they curiously installed and explored, and instinctively began to test and even torture each other. Everyone has secrets that cannot be told, and this lie detector device "Guide" has brought the love of the two to a very dangerous situation. Should they tell the truth to their lover, or continue to lie to maintain this relationship?