Atsushi has fallen in love with his best friend's mother, Kanna. He often visits his best friend's house and is excited about Kanna, but gradually he is no longer satisfied with just looking at her face. Then, by chance, Kanna ends up teaching him yoga. Their bodies are pressed together. Her beautiful butt is sticking out in front of him... Atsushi is excited by the lewdness of her yoga poses, but he holds back, knowing that he can't lay a hand on his best friend's mother...