I practice stretching and muscle training with Rukawa, the female ace of the track and field team. The smell of her hair and the softness of her breasts that I could feel during our close-up training, and the sight of her panty line protruding from her bloomers made my cock hard, so I rubbed the tip of my cock against her slit through her bloomers, stimulating her by inserting it 1cm through the bloomers! She pretends to be practicing, but is she inviting me to insert it?! Eventually I can't hold back and insert it all the way! My cock was teased by the 1cm insertion through the bloomers, and it felt so good to have her make me cum with her big ass in the cowgirl position...I became addicted to Rukawa, even though I have a girlfriend.