During a scorching summer, a modest mother practices energy conservation. The heat warps the air, sweat glistening on her skin, clothes clinging and becoming translucent, revealing her feminine form. Power outlets are unplugged—TV, radio, fan, everything switched off. Wearing an apron, the mother is alone, wiping the floor clean. In the classic denim shorts pose, she leans forward on all fours. The virtuous mother, Kyoka Iwashita, raises her hips high as she cleans. Her plump, round buttocks and sheer glimpses of her chest and back are visible through the sweat-soaked fabric. She sweats profusely; the straps of her bra are completely see-through, droplets falling steadily onto the engawa. Her figure, engaged in simple housework, exudes a quiet allure—not just from the heat, but from her unwavering modesty even in such oppressive conditions.