Rina lives at her husband's parents' house, which inherited the family business. When I got used to living with my parents-in-law, my brother-in-law came back with a debt. On the night when the family was away alone, Rina woke up and noticed her brother-in-law's eyes. I felt my body burning in spite of my enthusiastic gaze. Intertwined eyes. In the sweltering summer heat, each other's sweat was dazzling and they opened the forbidden door ...