In a peaceful rural town, an unexpected lesbian cuckoldry incident unfolds. Set against a backdrop of traditional, tranquil Japanese houses, the winter sky stretches across the garden, with open windows along the engawa veranda. Iori Ryouko, wearing an apron, embodies a pastoral scene—cheerful as she hums a tune while wiping down the porch. Her plump denim-clad backside rises high as she arches her back, exuding a quaint, charming elegance. She pauses with a sigh, pulling a postcard from her apron pocket—it's a letter from her younger brother living in Tokyo. A few days later, her brother arrives with his wife, Misuzu, and the story takes a dramatic turn.