The moment he opened the bathroom door, Hiroshi froze. He saw his mother's friend Natsumi peeing. Natsumi had come to look after Hiroshi while his parents were away on a trip. An awkward atmosphere flowed between the two. But what was even more problematic for Hiroshi was that he could not suppress his erection when he saw Natsumi 's indecent appearance. Natsumi , Natsumi's marriage life was also at a halt, and she was extremely frustrated... A dangerous time begins for the two of them alone in the house without their parents.