Hajime is an extremely shy person, he has no friends, does not like going to school, always hides in the game room. This summer vacation, his parents sent him back to the countryside to change the atmosphere. Because his uncle had work, he was sent to be taken care of by the neighbor. The neighbor Tsukasa-san is very young and beautiful. Her sexual desire is very high, but her husband cannot satisfy her enough, so she decides to seduce the young neighbor boy. How can a young boy resist the beauty of Tsukasa? And the two secretly have sex with each other, regardless of whether it is day or night, even when her husband is right next to her...