Sasaki works at a company that provides "rental mother" services. The company's main customers are mothers who do not have time to spend with their children. Sasaki is hired to be Kenichi's mother, she will be in charge of playing and taking care of him when the landlady is away. Kenichi wants to play superman with Sasaki, and while playing, her short skirt is accidentally pulled upwards, causing all of her slender white thighs to appear completely in front of his eyes. Especially the underwear that kept appearing made Kenichi come up with another idea, he would play the role of a monster to attack Sasaki! At that time, Kenichi constantly touched and massaged her beautiful buttocks! In the evening, Kenichi wanted to suck Sasaki's breasts, and she pampered him, sucking his breasts to his heart's content before going to bed. The next day, Kenichi walked home crying. Sasaki asked, but he found out, but Kenichi was bullied by his friends because he didn't know how to have sex! Loving him, Sasaki taught him how to make love to her! And from there, Kenichi frequently read pornographic magazines and applied what he learned with Sasaki. Sasaki was also very pleased and let him do whatever he wanted with her.