Investigator Hikari begins tracking a junior to catch the mastermind of a human trafficking organization. A week of sweat and days of abstinence in a closed room with a broken air conditioner in the middle of summer... The two of them had exceeded the limit, cutting the tension wire and crossing the boundary. Even though they were on a mission, they forgot themselves and kept Ji Po suffocated with Jupojupo, and they tangled themselves roughly with each other while shedding sweat and bodily fluids. The relationship will end when the case is solved, but Hikari, who has learned sex she truly feels...