Nagai, an ordinary young man, has a secret crush on 'Shoko', the woman he's always admired. One day, he witnesses Shoko's private moment in a warehouse and is deeply shocked. Then, on a sweltering summer day, as if by a twist of fate, the two become trapped inside the warehouse. With no way out, and in the suffocating heat filled only with ragged breaths, their relationship slowly begins to change...