Three years into marriage, life had grown comfortable, and I started feeling a certain sense of peaceful stagnation. Then one day, Yuki suggested joining an English conversation class, invited by a friend. Thinking she might be struggling with staying home alone all day, I casually agreed. But when I saw photos she took at the class, I was shocked by what I discovered. In the pictures, her black instructor Roberto had his arm around her shoulder, touching her possessively and intimately. Yuki, in turn, wore a subtly satisfied expression, seemingly enjoying his excessive physical contact...