Hikari, my senior coworker, is rough around the edges and has a tomboyish personality. Yet her huge tits are obvious even beneath her work clothes, and I secretly watch the cleavage exposed when she bends over and the bra showing through her sweat-soaked T-shirt. One day after work, as we are getting ready to leave the office, she teasingly says, “Hey, let me see your cock,” and starts touching it. Her sudden prank makes me blow my load, and before long we are having sweaty sex in the stifling room. From then on, we become casual sex partners who use each other whenever we get horny...