In the late-night streets of Yokohama, Japan, a male prostitute encounters a film director. He boldly offers himself for an audition, only to be confronted with the haunting question: "What is love?" In the heart of downtown Tokyo, a same-sex couple who have been together for seven years find the spark in their relationship fading. They decide to invite a third person to join them, unaware that the arrival of this mysterious stranger will irrevocably transform their lives. Inside an adult cinema, a "money boy" in the back row meets a middle-aged married man in the front. Their transaction carries a hidden undercurrent of danger. In the vast expanse of the city, these young men are struggling to survive, wavering in their pursuit of affection. But in the end, what does true love really mean?