Yuzuru moved out to live on his own after getting into university. His neighbor is Sumire, a beautiful and kind woman who always cares and helps him. Today, Sumire bought a cake for her husband but he suddenly had to leave for urgent business. On her way home, she met Yuzuru and invited him to her house to eat cake and drink coffee. The coffee was a bit bitter so Yuzuru wanted to add some sugar. Sumire couldn't find it, so she tried to search in the lower cabinet, bending down low. Because of that, her big and seductive buttocks were right in front of Yuzuru. He was attracted by her buttocks, his cock quickly got hard, and his mind gradually lost control. He grabbed Sumire and inserted his cock inside her, giving Sumire a satisfying experience. Sumire wasn't too upset with Yuzuru but made him promise not to disclose this incident and not to repeat it. Yuzuru promised, but a few days later, Sumire called him to her house to fix the air conditioner. Yuzuru played the role of a 'lucky air conditioner repairman' while enjoying the view of her beautiful buttocks from below. Unable to control himself, Yuzuru continued to have sex with Sumire. And their twisted relationship began from then on, with Sumire actively going to Yuzuru's house to teach him yoga, but her main purpose was...