One day, a new housekeeper suddenly arrives at Shota-kun's home. Her name is Sarina—a married woman with stunning 100cm J-cup breasts that make anyone's heart race just looking at them. Shota immediately becomes excited by her presence. From that day on, he pretends to have a fever and tricks her into giving him nursing care, using it as an excuse to play increasingly naughty pranks. He interrupts her while she's cleaning the bathroom, sprays her with shower water, and insists she bathe with him, pulling off one outrageous stunt after another. Each time, though flustered, Sarina has no choice but to go along with Shota's antics. As these encounters grow bolder in their everyday life, the connection between them deepens steadily.